Nominated for Best Actress, Ruth Negga wore a custom made red lace gown by Maison Valentino - adorned with a blue ribbon in support of the American Civil Liberties Union. Ruth's stylist Karla Welch wrote on Instagram that it was the accessory she is most proud of.
Ruth's character Mildred in the film Loving - based on a true story about an interracial marriage in the late 60s - was represented by the ACLU. Picture / Getty.
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Another ACLU ribbon on the red carpet, from model Karlie Kloss - who teamed her crisp white caped Stella McCartney gown with a diamond choker and Roger Vivier handbag. Picture / Getty
Empire and Hidden Figures actress Taraji P. Henson brings the glamour in a velvet gown by Alberta Ferretti. Picture / Getty
Actor and Hamilton playwright Lin-Manuel Miranda, nominated for Best Original Song for How Far I'll Go from Moana, told reporters that his tux was from "San Marko in Yonkers, New York, where I got my prom tux in 1998". He's with his mother Luz Towns-Miranda. Picture / Getty
Kirsten Dunst embraces the dark side in a sculptural strapless Dior couture gown and diamond necklace. Important detail to note: pockets! Picture / Getty
Without a doubt one of the best dressed men in the world, Pharrell opts for a custom-made Chanel tail coat and trousers, complete with brooch and necklace. The archival look is taken from Chanel's spring 2009 collection. Picture / Getty
She'll likely get savaged for this gold Gucci gown, but we love the retro 80s glamour of Dakota Johnson's look: high-neckled ruffles, bow detail at the waist and a dramatic Cartier necklace. The gown is from Gucci's Fall 2017 collection, just shown in Milan. Picture / Getty
No surprises here: Best Supporting Actress nominee Michelle Williams arrives with her usual red carpet date and best friend Busy Phillips (in an Elizabeth Kennedy gown), wearing a custom halterneck gown designed her red carpet fall-back, Nicolas Ghesquiere for Louis Vuitton. Picture / Getty
More Oscars gold. Best Actress winner Emma Stone shines in an intricately beaded, tiered flapper style gown by Givenchy couture - one of the last looks designed by former Givenchy creative directory Riccardo Tisci, who resigned earlier this month. Earrings and diamond ring from Tiffany & Co. complete the look. Picture / Getty
Best Supporting Actress winner Viola Davis wears a custom Armani Prive silk gown in red - the colour of the moment - with draped shoulders and pleating on the bodice. Picture / Getty
Best Supporting Actor nominee Dev Patel, wearing a custom-made Burberry tuxedo, took his mum Anita as his date - who took a little of the spotlight with her beautiful black and gold sari. Picture / Getty
Last year Brie Larson wore Gucci to win Best Actresss, and this year she continues her fashion credentials - and brings some sass to the red carpet - in a strapless, ruffled velvet dress by Oscar de la Renta. Picture / Getty
It can be hard for men to try something new on the red carpet, but Best Actor nominee Ryan Gosling goes full prom king in a ruffled shirt and tuxedo by Gucci. Picture / Getty
A refreshing shorter hemline from Naomie Harris, who wears a minimal white sequined cocktail dress by Calvin Klein by Appointment. The dress is the first red carpet outfit designed by Raf Simons in his new role as chief creative officer of the brand, and he also dressed some of Naomie's co-stars in the Best Picture nominated film Moonlight. Picture / Getty.
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The always elegant Isabelle Huppert, nominated for Best Actress for her role in the film Elle, wore a blush pink silk chiffon plissé gown by Armani Prive, embroidered with silver crystals and accented with a crystal-encrusted belt. Picture / Getty