Gwyneth Paltrow, 51, steps out in a slinky black cocktail dress at Boucheron's NYFW event

Gwyneth Paltrow took the plunge into green in a provocative black cocktail dress at the Boucheron In America event at New York Fashion Week.

A whole host of famous people marched to the Cooper Hewitt, Smithsonian Design Museum this Tuesday evening in honor of the jewelry brand.

The most striking among them was 51-year-old Gywneth, whose complexion was radiant despite her age as she strutted through the festival.

She chose a dress with a neckline low enough to not only reveal her cleavage but also reveal a hint of her enviably slim waist.

Exuding a classic sense of style, she completed the look with a single glittery necklace and balanced on a pair of towering ankle-strap heels.

Gwyneth Paltrow took the plunge in a revealing black cocktail dress at the Boucheron In America event at New York Fashion Week

Exuding a classic sense of style, Paltrow, 51, accessorized the look with a single glittering necklace and balanced on a towering pair of ankle-strap heels

The Oscar winner emphasized her distinctive facial features with makeup and threw her signature silky blonde strands of hair over her shoulder.

She was seen with French billionaire François-Henri Pinault, CEO of Boucheron's parent company Kering and husband of Salma Hayek.

“Riverdale” star Cole Sprouse, looking dashing as ever in a black suit with a silver brooch, attended the party on the arm of his girlfriend Ari Fournier.

Ari, a model who has been dating Cole for over three years, exuded old-fashioned glamour in a floor-length black dress with a seductively sheer bust.

Zola star Colman Domingo hinted at his toned chest in a half-open silk top, combined with matching trousers and shoes.

Meanwhile, “Pitch Perfect 2” actress Hailee Steinfeld caused a stir in a slit dress with an extravagant train and raised shoulders.

The long-sleeved dress evoked memories of old Hollywood, but was combined with a retro-chic hairstyle straight from the Swinging Sixties.

Alexa Chung showed off her dizzying legs in a high-cut black mini dress that also showed off her hourglass figure.

She stood on high, open heels

Gywneth's complexion was radiant despite her age as she strutted around the festival

A glittering necklace rested on her collarbones

She was seen with French billionaire François-Henri Pinault, CEO of Boucheron's parent company Kering and husband of Salma Hayek.

Riverdale star Cole Sprouse, looking dapper as ever in a black suit with a silver brooch, attended the party on the arm of his girlfriend Ari Fournier

Ari, a model who has been dating Cole for over three years, exuded old-fashioned glamour in a floor-length black dress with a tantalisingly transparent bust

Zola star Colman Domingo showed off his toned chest in a half-open silk top and matching trousers and shoes

Hailee Steinfeld, the actress from Pitch Perfect 2, caused a stir in a slit dress with an extravagant train and raised shoulders.

Alexa Chung showed off her dizzying legs in a high-cut black mini dress that also showed off her hourglass figure

The strapless dress matched her tights and heels and offered an elegant contrast to her red hair, which she complemented with crimson lipstick.

Polish supermodel Anja Rubik was a head-turner in a backless top and a see-through skirt through which her black underwear was clearly visible.

She adds even more stature to her look with a pair of sky-high stilettos, and occasionally the slim 1.78 meter tall fashionista throws a wide blazer over her

At some point, Ari, Cole, Gwyneth, Colman, Haile, Anja Rubik and Alexa Chung met with Mina Myoi for an unforgettable group photo with many stars

The strapless dress matched her tights and heels and offered an elegant contrast to her red hair, which she completed with crimson lipstick.

Polish supermodel Anja Rubik was a sight to behold in a backless top and a see-through skirt that clearly showed her black underwear.

She added even more stature with a pair of sky-high stilettos and occasionally the lithe 5'10″ fashionista threw on a loose blazer.

At some point, Ari, Cole, Gwyneth, Colman, Haile, Anja Rubik and Alexa Chung met with Mina Myoi for an unforgettable group photo with many stars.

Mina, a Japanese singer who has become a star in South Korea, stood out in a 1930s-style off-the-shoulder black dress.