Lovely in lace! Pregnant Jessica Alba shows off her growing baby bump in black gown at Baby2Baby Gala with husband Cash Warren

She's expecting her third child - a baby boy - with husband Cash Warren.

And on Saturday night, pregnant Jessica Alba showed off her growing baby bump in a glamorous black lace gown for the Baby2Baby gala in Los Angeles.

The 36-year-old paired the form fitting frock with a velvet purse, diamond earrings and bold red lipstick.

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Wow factor: Pregnant Jessica Alba showed off her growing baby bump in a glamorous black lace gown for the Baby2Baby gala in Los Angeles on Saturday

Wow factor: Pregnant Jessica Alba showed off her growing baby bump in a glamorous black lace gown for the Baby2Baby gala in Los Angeles on Saturday

The gorgeous mother of two's frock had a see-through lace overlay; the lace accent served as the sleeves of the gown.

Jessica toted a burgundy and black bucket bag with massive sparkling pendant earrings and coordinating rings.

The pregnant beauty styled her brunette locks in deep waves, opting for a deep side part.

The Dark Angel actress painted her full pout a red hue with shimmery silver eye shadow on her lids.

Happily ever after: She's expecting her third child - a baby boy - with husband Cash Warren

Happily ever after: She's expecting her third child - a baby boy - with husband Cash Warren

 That mama glow: The 36-year-old paired the form fitting frock with a velvet purse, diamond earrings and bold red lipstick

 That mama glow: The 36-year-old paired the form fitting frock with a velvet purse, diamond earrings and bold red lipstick

Charisma: The gorgeous mother of two's frock had a see-through lace overlay; The lace accent served as the sleeves of the gown
Charisma: The gorgeous mother of two's frock had a see-through lace overlay; The lace accent served as the sleeves of the gown

 Charisma: The gorgeous mother of two's frock had a see-through lace overlay; The lace accent served as the sleeves of the gown

Jessica and Cash are parents to two daughters: nine-year-old Honor Marie and six-year-old Haven Garner, six.

She revealed in October she is expecting a son, although she didn't say when her due date is.

Also attending the gala is Olivia Culpo, who was Miss Universe 2012.

Good looking duo: Jessica and Cash are parents to two daughters: nine-year-old Honor Marie and six-year-old Haven Garner, six

Good looking duo: Jessica and Cash are parents to two daughters: nine-year-old Honor Marie and six-year-old Haven Garner, six

Elegant: Jessica toted a burgundy and black bucket bag with massive sparkling pendant earrings and coordinating rings

Elegant: Jessica toted a burgundy and black bucket bag with massive sparkling pendant earrings and coordinating rings

Beaming: The pregnant beauty styled her brunette locks in deep waves, opting for a deep side part

Beaming: The pregnant beauty styled her brunette locks in deep waves, opting for a deep side part

Before and after: The Dark Angel actress painted her full pout a red hue with shimmery silver eye shadow on her lids

Before and after: The Dark Angel actress painted her full pout a red hue with shimmery silver eye shadow on her lids

The 25-year-old star looked glamorous in her green and black dress featuring polka dots and lace accents.

Olivia rocked glittering earrings with her short brown locks pulled back into a bun.

Zoe Saldana and husband Marco Perego posed on the carpet together.

Incredible: Also attending the gala is Olivia Culpo, who was Miss Universe 2012

Incredible: Also attending the gala is Olivia Culpo, who was Miss Universe 2012

Strike a pose: Olivia rocked glittering earrings with her short brown locks pulled back into a bun

Strike a pose: Olivia rocked glittering earrings with her short brown locks pulled back into a bun

Date night: Zoe Saldana and husband Marco Perego posed on the carpet together

Date night: Zoe Saldana and husband Marco Perego posed on the carpet together

Zoe, 39, looked elegant in her black blazer inspired dress, complete with button details on the skirt.

She paired the classic number, which had an asymmetrical lapel, with strappy lace heels and a handful of glittering rings.

Zoe finished off the chic ensemble with red lipstick and a silver clutch. 

Fellow actress Gwyneth Paltrow donned black trousers with a matching blazer.

The Goop founder, 45, wore pointed heels with her blonde locks in waves. 

Amazing: Zoe, 39, looked elegant in her black blazer inspired dress, complete with button details on the skirt

Amazing: Zoe, 39, looked elegant in her black blazer inspired dress, complete with button details on the skirt

Fancy: She paired the classic number, which had an asymmetrical lapel, with strappy lace heels and a handful of glittering rings
Fancy: She paired the classic number, which had an asymmetrical lapel, with strappy lace heels and a handful of glittering rings

Fancy: She paired the classic number, which had an asymmetrical lapel, with strappy lace heels and a handful of glittering rings

Elegant: Fellow actress Gwyneth Paltrow donned black trousers with a matching blazer

Elegant: Fellow actress Gwyneth Paltrow donned black trousers with a matching blazer

Jessica Biel flashed skin in her see-through mesh dress, revealing a strapless bra and embroidered hot pants.

The mother of one paired the eye catching look with an emerald and diamond necklace; Jessica wore Tiffany & Co. earrings and rings.

Jessica, 35, wore her hair pulled back with pink lipstick and minimal eye makeup. 

Chrissy Teigen hit the carpet just hours after attending Kim Kardashian's baby shower; Kim and husband Kanye West are expecting a daughter via surrogate. 

The model and author, 31, wowed in her off-the-shoulder crimson gown, complete with embroidery along her torso. 

Chrissy, who is married to John Legend, painted her pout a red color with her locks in a top knot. 

Star power: Jessica Biel flashed skin in her see-through mesh dress, revealing a strapless bra and embroidered hot pants

Star power: Jessica Biel flashed skin in her see-through mesh dress, revealing a strapless bra and embroidered hot pants

Flaunting her figure: The mother of one paired the eye catching look with an emerald and diamond necklace; Jessica wore Tiffany & Co. earrings and rings

Flaunting her figure: The mother of one paired the eye catching look with an emerald and diamond necklace; Jessica wore Tiffany & Co. earrings and rings

Glamorous: Chrissy Teigen hit the carpet just hours after attending Kim Kardashian's baby shower; Kim and husband Kanye West are expecting a daughter via surrogate

Glamorous: Chrissy Teigen hit the carpet just hours after attending Kim Kardashian's baby shower; Kim and husband Kanye West are expecting a daughter via surrogate

Red hot: The model and author, 31, wowed in her off-the-shoulder crimson gown, complete with embroidery along her torso
Red hot: The model and author, 31, wowed in her off-the-shoulder crimson gown, complete with embroidery along her torso

Red hot: The model and author, 31, wowed in her off-the-shoulder crimson gown, complete with embroidery along her torso

She's a ten: Chrissy, who is married to John Legend, painted her pout a red color with her locks in a top knot

She's a ten: Chrissy, who is married to John Legend, painted her pout a red color with her locks in a top knot

Jennifer Garner looked like a goddess in her cascading white dress and matching cape.

The mother of three, 45, paired the elegant ensemble with pink lipstick and waves.

Singer Kelly Rowland opted for ruffles for her look; she chose a jumpsuit with loose bottoms. 

Angelic: Jennifer Garner looked like a goddess in her cascading white dress and matching cape

Angelic: Jennifer Garner looked like a goddess in her cascading white dress and matching cape

Goddess: The mother of three, 45, paired the elegant ensemble with pink lipstick and waves
Goddess: The mother of three, 45, paired the elegant ensemble with pink lipstick and waves

Goddess: The mother of three, 45, paired the elegant ensemble with pink lipstick and waves

Monochrome magic: Jennifer added towering black heels to her look and accessorised with a matching clutch bag

Monochrome magic: Jennifer added towering black heels to her look and accessorised with a matching clutch bag

Effortless: Singer Kelly Rowland opted for ruffles for her look; she chose a jumpsuit with loose bottoms

Effortless: Singer Kelly Rowland opted for ruffles for her look; she chose a jumpsuit with loose bottoms

Nicole Richie showed her wild side in a leopard print maxi gown, complete with 70s-style bell sleeves and a gorgeous ruffled hem. 

Cinching in at her slim waist with a chunky black belt, the socialite then tied her look together with an equally eye-catching turquoise pendant, as she posed with her rocker husband Joel Madden.

Not only turning heads on the carpet, Nicole later caught attention inside as she presented an award with actress Kristen Bell. 

Perrfect: Nicole Richie wowed in her leopard frock while posing on the carpet with her husband rocker Joel Madden

Perrfect: Nicole Richie wowed in her leopard frock while posing on the carpet with her husband rocker Joel Madden

All eyes on me: Cinching in at her slim waist with a chunky black belt, the socialite then tied her look together with an equally eye-catching turquoise pendant

All eyes on me: Cinching in at her slim waist with a chunky black belt, the socialite then tied her look together with an equally eye-catching turquoise pendant

Dynamic duo: Not only turning heads on the carpet, Nicole later caught attention inside as she presented an award with actress Kristen Bell

Dynamic duo: Not only turning heads on the carpet, Nicole later caught attention inside as she presented an award with actress Kristen Bell

Rocking out: Proving their playful nature however, the girls proceeded to dance o the ceremony's music

Rocking out: Proving their playful nature however, the girls proceeded to dance o the ceremony's music

Style queen: Kristen was equally stunning in a pale blue gown, complete with striking pointed shoulders and a plunging neckline

Style queen: Kristen was equally stunning in a pale blue gown, complete with striking pointed shoulders and a plunging neckline

Having a ball: The girls proceeded to make a number of jokes - causing both the audience and themselves to giggle

Having a ball: The girls proceeded to make a number of jokes - causing both the audience and themselves to giggle

Say cheese! After his big appearance onstage, Nicole later posed with Baby2Baby co-President Kelly Sawyer
Say cheese! After his big appearance onstage, Nicole later posed with Baby2Baby co-President Kelly Sawyer

Say cheese! After his big appearance onstage, Nicole later posed with Baby2Baby co-President Kelly Sawyer

Cosy: Jaime King and Selma Blair embraced for cameras once inside

Cosy: Jaime King and Selma Blair embraced for cameras once inside

Catching up: The glamorous girls were seen deep in conversation as they sipped on coffees and enjoyed the food on offer

Catching up: The glamorous girls were seen deep in conversation as they sipped on coffees and enjoyed the food on offer

The Forgetting Sarah Marshall star dazzled in a stunning pale blue frock, complete with statement pointed shoulders and a raunchy plunging neckline, as she joined Nicole onstage.

Proving their playful nature however, the girls proceeded to rock out to the ceremony's music, before making a number of jokes - causing both the audience and themselves to giggle. 

Kristen was later seen heading out to party after the ceremony, with her suited and booted husband Dax Shepard, who she wed in 2013.  

What a lady: Alessandra Ambrosio flashed her legs in a gorgeous strapless floral dress

What a lady: Alessandra Ambrosio flashed her legs in a gorgeous strapless floral dress

Flower power: The Victoria's Secret model flaunted her cleavage and her toned legs in the incredible frock

Flower power: The Victoria's Secret model flaunted her cleavage and her toned legs in the incredible frock

Pretty in pattern: Rachel Bilson chose an ankle length dress, with a strapless neckline and floral pattern
Pretty in pattern: Rachel Bilson chose an ankle length dress, with a strapless neckline and floral pattern

Pretty in pattern: Rachel Bilson chose an ankle length dress, with a strapless neckline and floral pattern

Pretty lady: January Jones paired a polka dot patterned maxi skirt with a coordinating crop top and red lipstick

Pretty lady: January Jones paired a polka dot patterned maxi skirt with a coordinating crop top and red lipstick

Smile! The mother-of-one cosied up to Rachel at the table

Smile! The mother-of-one cosied up to Rachel at the table

Star-studded: January later caught up with fellow fashionistas Jessica (L) and Rachel Zoe (R)
Star-studded: January later caught up with fellow fashionistas Jessica (L) and Rachel Zoe (R)

Star-studded: January later caught up with fellow fashionistas Jessica (L) and Rachel Zoe (R)

Meanwhile Alessandra Ambrosio, 36, dazzled in a shoulder-less ball gown, adorned with purple floral highlights.

Accessorising with simple silver heels to keep all eyes on her look, the Brazilian stunner then added a matching floral diamond choker, in a glamorous touch.  

She swept her dark locks into a sophisticated up-do, and sported an impeccable makeup look to accentuate her famously striking features as she posed. 

Close: Jaime King paired her floral and red dress with a velvet clutch; pictured on the black carpet with husband Kyle Newman

Close: Jaime King paired her floral and red dress with a velvet clutch; pictured on the black carpet with husband Kyle Newman

Princess vibes: Kristen Bell wore a light blue ruffled gown with a plunging neckline
Princess vibes: Kristen Bell wore a light blue ruffled gown with a plunging neckline

Princess vibes: Kristen Bell wore a light blue ruffled gown with a plunging neckline

Loved-up: Kristen later headed out after the gala with husband Dax Shepard

Loved-up: Kristen later headed out after the gala with husband Dax Shepard

Still going strong: Kristen tied the knot with the hunk back in 2013

Still going strong: Kristen tied the knot with the hunk back in 2013

Silver sirens: Jordana Brewster and Molly Sims slipped on metallic frocks
Silver sirens: Jordana Brewster and Molly Sims slipped on metallic frocks

Silver sirens: Jordana Brewster and Molly Sims slipped on metallic frocks

Inseparable: Molly Sims and her husband Scott Stuber recently welcomed their third child

Inseparable: Molly Sims and her husband Scott Stuber recently welcomed their third child

A vision: Modern Family actress Julie Bowen wowed in her colorful flower emblazoned look

A vision: Modern Family actress Julie Bowen wowed in her colorful flower emblazoned look

Bold: Selma Blair and Eiza Gonzalez chose a striped look for the gala
Bold: Selma Blair and Eiza Gonzalez chose a striped look for the gala

Bold: Selma Blair and Eiza Gonzalez chose a striped look for the gala

Classy bunch: Busy Philipps, Sara Foster, Jennifer Meyer, Molly Sims, Nicole Richie, Jessica Alba, Kelly Sawyer Patricof, Norah Weinstein and Julie Bowen at the Baby2Baby gala

Classy bunch: Busy Philipps, Sara Foster, Jennifer Meyer, Molly Sims, Nicole Richie, Jessica Alba, Kelly Sawyer Patricof, Norah Weinstein and Julie Bowen at the Baby2Baby gala

Sister sister: Erin and Sara Foster looked gorgeous on the carpet before heading in

Sister sister: Erin and Sara Foster looked gorgeous on the carpet before heading in

Classy: Lindsey Price (l) and Devon Aoki (r) both chose similar cut dresses, although in contrasting colors
Classy: Lindsey Price (l) and Devon Aoki (r) both chose similar cut dresses, although in contrasting colors

Classy: Lindsey Price (l) and Devon Aoki (r) both chose similar cut dresses, although in contrasting colors

A pop: Actress Rebecca Gayheart donned a navy strapless gown with a statement cheetah patterned clutch

A pop: Actress Rebecca Gayheart donned a navy strapless gown with a statement cheetah patterned clutch

Chic: Rachel Zoe (l) and Jennifer Meyer (r) cut stylish figures in their gowns
Chic: Rachel Zoe (l) and Jennifer Meyer (r) cut stylish figures in their gowns

Chic: Rachel Zoe (L) - rocking a David Webb 'Hutton' ring - and Jennifer Meyer (R) cut stylish figures in their black gowns

Bright: Busy Philipps flaunted her curves in an eighties inspired sequined dress

Bright: Busy Philipps flaunted her curves in an eighties inspired sequined dress

Suited up: Josh Harnett arrived in a patterned button up with a blazer and trousers set

Suited up: Josh Harnett arrived in a patterned button up with a blazer and trousers set

Matching: Lara Bingle and Sam Worthington kept their looks simple, opting for neutrals

Matching: Lara Bingle and Sam Worthington kept their looks simple, opting for neutrals

Marvelous moms! Gwyneth shared a sweet hug with pal Jennifer

Marvelous moms! Gwyneth shared a sweet hug with pal Jennifer

In shape: The actress' fit form is one that girls half her age would love to have

In shape: The actress' fit form is one that girls half her age would love to have

Top honor: The beauty took home the Giving Tree Award

Top honor: The beauty took home the Giving Tree Award

Handsome: Designer Tom Ford looked dapper at the event

Handsome: Designer Tom Ford looked dapper at the event

Time to chat: During the night, he also addressed the crowd

Time to chat: During the night, he also addressed the crowd

Happy: Gwyneth looked to be so thankful for her award

Happy: Gwyneth looked to be so thankful for her award

What a stunner: Jessica was absolutely glowing as she cradled her baby bump

What a stunner: Jessica was absolutely glowing as she cradled her baby bump

Simply amazing: Jessica is truly one of the most beautiful women in Hollywood, and the world

Simply amazing: Jessica is truly one of the most beautiful women in Hollywood, and the world

Two! Apparently Jessica wasn't the only pregnant woman in attendance. Designer Rebecca Minkoff is as well

Two! Apparently Jessica wasn't the only pregnant woman in attendance. Designer Rebecca Minkoff is as well

Glittering: Kelly shared a glamorous selfie of her diamond jewelry before heading to the event

Glittering: Kelly shared a glamorous selfie of her diamond jewelry before heading to the event

Star power: Kelly appeared in awe of Jessica as she hit the stage

Star power: Kelly appeared in awe of Jessica as she hit the stage