The model, 35, wowed in a sheer cut-out, floor-length look by Alberta Ferretti with voluminous sleeves and sparkly detail.
She finished off her look with a quirky, plaited up-do, glowy make-up and a pair of black heels for the 95th Annual Academy Awards.
Similarly, Elizabeth Olsen looked elegant in a plunging black, sequinned halter-neck dress by Givenchy.
The 34-year-old actor accessorised her look – which featured sheer detailing at the hem – with strapped black heels and a slick of red lipstick.
Meanwhile, Vanessa Hudgens posed on arrival at the star-studded LA event in a monochrome dress by Chanel.
The actor, 34, wowed in the form-fitting, strapless black look, which also featured a retro white trim.
She wore her hair in an elegant up-do and finished off her ensemble with minimal jewellery.
The previous evening, a number of stars – including Rita Ora and Lily James – had also opted for lacy, sheer black ensembles at a pre-Oscars Chanel dinner.
It comes as the Oscars swapped red for a luxurious 'champagne' carpet for the first time since 1961.
The Associated Press reported that the unusual new "sienna, saffron" shade had been chosen because it "evokes the sunset".
As usual, the ceremony took place at the Dolby Theatre in Hollywood and this year was hosted by Jimmy Kimmel.
The movie Everything Everywhere All At Once, starring Michelle Yeoh, was the big winner on the night, taking home seven awards in total including Best Picture. Yeoh also won Best Actress, becoming the first person from an Asian background to be named best actress.
Watch: The Oscars will not have a red carpet for the first time since 1961