Actress Blanca Blanco dared to bare at the 89th annual Academy Awards on Sunday.

In a sea of flowing Cinderella-style ballgowns, Bianca opted to go underwear free on the red carpet.

And the star suffered an almighty wardrobe malfunction in her extreme thigh split dress.

As she posed for pictures, the yellow and gold embellished frock fell open, revealing a lot more than she probably bargained for.

Fortunately, brunette Blanca didn’t seem fazed by the serious fashion faux pas and continued to smile for camera.

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Elsewhere on the carpet, Ruth Negga, who is nominated for her role in Loving, in which she plays the real-life Mildred Loving, who was jailed for entering a mixed-race marriage with husband Richard in 1950s Virginia, opted for a bold red custom-made lace Valentino gown.

The 35-year-old actress honoured the American Civil Liberties Union (ACLU) with a small blue ribbon pinned to her dress.

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Chrissy Teigen looked a picture of perfection in her angelic thigh split white gown, while model Karlie Kloss also opted for an elegant white frock.

Actress and singer Hailee Steinfeld pulled out all the stops in a gorgeous white gown that was adorned with light pink flowers.