In pictures: Stars on the Oscars red carpet
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Whoopi Goldberg showcased her shoulder tattoo and unusual ring/bracelet ahead of the ceremony. She told Us Weekly her dress was based on the one Hollywood starlet Bette Davis wore in All About Eve in 1950.

A-list couples alert - best actor nominee Eddie Redmayne poses for the cameras with his pregnant wife, Hannah Bagshawe, while actors Sacha Baron Cohen and Isla Fischer also graced the red carpet.

Naomi Watts, who has been nominated twice for best actress in the past, Rush actress Olivia Wilde and last year's best actress winner Patricia Arquette, are among the attendees.

Brie Larson and Cate Blanchett are up for best actress for Room and Carol respectively, while Rachel McAdams will be hoping to go home with the best supporting actress Oscar for her role in Spotlight.

Everybody say "Ah..." Leo and Kate - aka Jack and Rose - are reunited on the red carpet. Will it be Leo and Kate's night?

Best song nominees Sam Smith, Lady GaGa and The Weeknd look excited to be at the big event - well, Sam Smith does anyway.

Last year's best actress winner Julianne Moore and with Reese Witherspoon and Rooney Mara.

Sylvester Stallone - up for best supporting actor for Creed - arrived with his wife, Jennifer Flavin.

Matt Damon - who won a screenplay Oscar for Good Will Hunting back in 1998 - posed with his wife Luciana Barroso before heading into the ceremony.

Saoirse Ronan landed her second Oscar nomination for Brooklyn this year (best actress), eight years after her first nomination for best supporting actress in Atonement.

Bryan Cranston, who was accompanied by his wife Robin Dearden, is celebrating his first Oscar nomination (best actor - Trumbo).

The Big Short actress Margot Robbie channelled the Oscar statuette in a striking gold dress with a snakeskin twist.