Charlize Theron, 51, flaunts age-defying physique in green fringe gown as she joins Jessica Alba, Serena Williams and Sienna Miller at Airbnb.org Gala

Charlize Theron sent temperatures soaring on Wednesday when she hit the red carpet of the Airbnb.org Gala in a sizzling emerald green gown.

The 51-year-old Oscar winner's fit figure made her look years younger than her true age as she led the stars at the event in Los Angeles.

Theron was joined at the gala by stars including Jessica Alba, Serena Williams and Sienna Miller, among many others.

Alba favored an elegant black single-shoulder gown, while Williams opted for a playful leopard-print dress and Miller looked angelic in white satin. 

The event marked Airbnb.org's first-ever gala. Unlike its for-profit sibling company, Airbnb.org is a nonprofit that offers free emergency housing to those devastated by natural disasters, illness or other crises.

Theron's gown featured long green fringe that nearly touched the floor and parted naturally to reveal her toned legs.

Charlize Theron sent temperatures soaring on Wednesday when she hit the red carpet of the Airbnb.org Gala in a sizzling emerald green gown

The 51-year-old Oscar winner's fit figure made her look years younger than her true age as she led the stars at the event in Los Angeles

Theron was joined at the gala by stars including Jessica Alba (above), Serena Williams and Sienna Miller, among many others

She highlighted her trim figure with a lustrous green waistband that matched the halter dress's shimmering collar.

The actress contrasted her colorful dress with black open-toe heels decorated with enormous puff balls over her toes.

She complemented her footwear with dark nails, and she wore her blond locks tied back in a slightly messy style.

Joining Theron on the red carpet was Airbnb co-founder Brian Chesky, who looked dapper in a classic black tuxedo. 

Alba projected classical elegance in a black gown that was ruched around her midriff.

The strapless look featured a single shoulder, and she paired it with standard black pumps that elevated her stature.

The actress styled her caramel-colored hair with a middle part, and she swept back her hair to reveal her diamond-studded earrings. 

Alba posed for photos with her friend, the socialite and influencer Carlos Eric Lopez, who rocked a chic double-breasted tuxedo with a baggy fit that he dressed down by skipping the bow tie. 

Theron's gown featured long green fringe that nearly touched the floor and parted naturally to reveal her toned legs

She highlighted her trim figure with a lustrous green waistband that matched the halter dress's shimmering collar

The actress contrasted her colorful dress with black open-toe heels decorated with enormous puff balls over her toes 

Joining Theron on the red carpet was Airbnb co-founder Brian Chesky, who looked dapper in a classic black tuxedo

Alba projected classical elegance in a black gown that was ruched around her midriff

The strapless look featured a single shoulder, and she paired it with standard black pumps that elevated her stature

Alba posed for photos with her friend, the socialite and influencer Carlos Eric Lopez, who rocked a chic double-breasted tuxedo with a baggy fit that he dressed down by skipping the bow tie

Williams highlighted her muscular figure in her leopard-print dress, which was decorated with glittering silver sequins. 

The 45-year-old tennis star's sleeveless dress featured a low-cut top and thick straps, and she paired it with pointy black heels.

Williams had long platinum-blond curls that complemented her silver-toned outfit and were swept to one side and cascaded down her shoulders.

She added a splash of color to her look with a splash of scarlet on her lips and a matching shade on her nails, and she showed off a passion for horology with a black ceramic Royal Oak from Audemars Piguet that featured a perpetual calendar and an openworked dial.

Audemars Piguet doesn't list the retail price of the difficult-to-obtain luxury sports watch, but secondary-market listings for it and similar Royal Oaks price it between $400,000 and $600,000.

Sienna Miller's all-white ensemble looked like the negative image of Alba's all-black outfit.

The 44-year-old British actress was draped in a single-shoulder white satin gown with folds radiating from a knot at her hips.

The long dress dragged on the floor and completely covered up her footwear, and Miller kept her accessories minimal with diamond earrings. 

Williams highlighted her muscular figure in her leopard-print dress, which was decorated with glittering silver sequins

The tennis star's sleeveless dress featured a low-cut top and thick straps, and she paired it with pointy black heels

Williams had long platinum-blond curls that complemented her silver-toned outfit and were swept to one side and cascaded down her shoulders

she showed off a passion for horology with a black ceramic Royal Oak from Audemars Piguet that featured a perpetual calendar and an openworked dial. The ultra-luxury sports watch sells on the secondary market for between $400,000 and $600,000

Sienna Miller's all-white ensemble looked like the negative image of Alba's all-black outfit. The 44-year-old British actress was draped in a single-shoulder white satin gown with folds radiating from a knot at her hips

The long dress dragged on the floor and completely covered up her footwear, and Miller kept her accessories minimal with diamond earrings

Miller was accompanied at the gala by her fiancé, Oli Green, who wore a dark double-breasted suit without a tie

Miller was accompanied at the gala by her fiancé, Oli Green, who wore a dark double-breasted suit without a tie.

Charli XCX stood out in a shimmering ruched olive-green gown with black feather trim that complemented her jet-black hair.

Matthew McConaughey wore an unusual gray tuxedo with a matching gray necktie as he arrived with his wife, Camila Alves.

She put on a busty display in a burgundy halter dress covered in gleaming sequins.

Demi Lovato eschewed dresses and gowns in favor of a black suit, which she gave an edge by going topless under the jacket. 

Oscar winner Zoe Saldana looked chic in an oversize black tuxedo that she wore without a top and with the sleeves rolled up. 

Wicked star Cynthia Erivo flashed her tattooed arms in a sleeveless black gown. 

The actress and singer sported a buzzed hairdo, and she added some color to the monochrome look with her fierce claws. 

Charli XCX stood out in a shimmering ruched olive green gown with black feather trim that complemented her jet-black hair

Matthew McConaughey wore an unusual gray tuxedo with a matching gray necktie as he arrived with his wife, Camila Alves

She put on a busty display in a burgundy halter dress covered in gleaming sequins

Demi Lovato eschewed dresses and gowns in favor of a black suit, which she gave an edge by going topless under the jacket

Oscar winner Zoe Saldana looked chic in an oversize black tuxedo that she wore without a top and with the sleeves rolled up

Wicked star Cynthia Erivo flashed her tattooed arms in a sleeveless black gown

The actress and singer sported a buzzed hairdo, and she added some color to the monochrome look with her fierce claws

Former Destiny's Child singer Kelly Rowland flashed her cleavage in a white lace dress decorated with hundreds of pearls and sparkling beads. 

Jimmy Kimmel kept things simple with a black suit and a matching tie.

Black-ish star Tracee Ross Ellis beamed ear-to-ear in a sleeveless beige dress that she spiced up with enormous earrings. 

La La Anthony shimmered in a plunging brown sequined dress featuring a lustrous satin corset midriff. 

Charli D'Amelio arrived in a bizarre dark plaid dress with a layer of black tulle bulging out from underneath her skirt.

She posed with Quenlin Blackwell, who wore a black gown with a cutout showcasing her ripped abs and her black lace bra.

Madelyn Cline looked festive in a black spaghetti-strap dress decorated with silver-sequined floral designs. 

Dawson's Creek star Joshua Jackson went for a casual look with a pale gray double-breasted suit jacket and contrasting black trousers and loafers. 

Former Destiny's Child singer Kelly Rowland flashed her cleavage in a white lace dress decorated with hundreds of pearls and sparkling beads

Jimmy Kimmel kept things simple with a black suit and a matching tie

Black-ish star Tracee Ross Ellis beamed ear-to-ear in a sleeveless beige dress that she spiced up with enormous earrings

La La Anthony shimmered in a plunging brown sequined dress featuring a lustrous satin corset midriff

Charli D'Amelio arrived in a bizarre dark plaid dress with a layer of black tulle bulging out from underneath her skirt. She posed with Quenlin Blackwell, who wore a black gown with a cutout showcasing her ripped abs and her black lace bra

Madelyn Cline looked festive in a black spaghetti-strap dress decorated with silver-sequined floral designs

Dawson's Creek star Joshua Jackson went for a casual look with a pale gray double-breasted suit jacket and contrasting black trousers and loafers

Chef José Andrés took a different approach with a classic black tuxedo and a bow tie. 

Journalism legend Katie Couric looked stylish in a lustrous black three-piece suit featuring a long skirt and tonal pinstripes. 

Elizabeth Banks looked youthful in a sleeveless lime-green sack dress with a long bow that dangled down her backside. 

Jaden Smith paired casual and classy with a pair of baggy flared jeans and a black double-breasted suit jacket with a skinny black tie. 

The son of Will Smith and Jada Pinkett Smith wore his long dreads piled atop his head, and he had on shiny pointy-toed shoes that poked out from his jeans.

The model Jasmine Tookes looked glamorous in a tightly ruched black gown that draped dramatically down one shoulder.

Filmmaker Ava DuVernay rocked a plunging black dress with long semi-sheer sleeves.

She made the unorthodox choice to wear her silvery Rolex Day-Date outside her sleeve. The luxury wristwatch – which is only available in precious metals – retails for $49,600 in white gold and $64,100 in platinum.

Chef José Andrés took a different approach with a classic black tuxedo and a bow tie

Journalism legend Katie Couric looked stylish in a lustrous black three-piece suit featuring a long skirt and tonal pinstripes

Elizabeth Banks looked youthful in a sleeveless lime-green sack dress with a long bow that dangled down her backside

Jaden Smith paired casual and classy with a pair of baggy flared jeans and a black double-breasted suit jacket with a skinny black tie. He wore his long dreads piled atop his head, and he had on shiny pointy-toed shoes that poked out from his jeans

The model Jasmine Tookes looked glamorous in a tightly ruched black gown that draped dramatically down one shoulder

Filmmaker Ava DuVernay rocked a plunging black dress with long semi-sheer sleeves

 She made the unorthodox choice to wear her silvery Rolex Day-Date outside her sleeve. The luxury wristwatch – which is only available in precious metals – retails for $49,600 in white gold and $64,100 in platinum

Will.i.am balanced sporty and classy with a black tuxedo with peaked lapels that he dressed down with a canary-yellow mock turtleneck

Instead of a standard suit or tuxedo, Avengers star Paul Bettany wore a stylish black Mao suit jacket with contrasting white trousers and black leather shoes

The singer Adéla sported her recognizable pink hair, which stood out against her black gown, which featured cutouts around her bust

The actress Greta Lee wore a powder blue dress with an aquamarine panel on her back and brilliant white heels

Chloë Grace Moretz flashed her toned tummy in a black suit with a coral-colored bandeau top

Soccer star Megan Rapinoe was topless under her oversize black suit, which she contrasted with her short pink hair

Filmmaker Jason Reitman favored a reliable black tuxedo and matching bow tie

Will.i.am balanced sporty and classy with a black tuxedo with peaked lapels that he dressed down with a canary-yellow mock turtleneck. 

Instead of a standard suit or tuxedo, Avengers star Paul Bettany wore a stylish black Mao suit jacket with contrasting white trousers and black leather shoes. 

The singer Adéla sported her recognizable pink hair. It stood out against her black gown, which featured cutouts around her bust. 

The actress Greta Lee wore a powder blue dress with an aquamarine panel on her back and brilliant white heels.

Chloë Grace Moretz flashed her toned tummy in a black suit with a coral-colored bandeau top. 

Soccer star Megan Rapinoe was topless under her oversize black suit, which she contrasted with her short pink hair. 

Filmmaker Jason Reitman favored a reliable black tuxedo and matching bow tie.