Emma Watson missed the Vanity Fair Oscar party because she fell asleep

Emma Watson missed Vanity Fair's Oscars after-party because she fell asleep when she returned to her hotel room to change and chose to indulge in pizza and relax.

The 23-year-old actress was planning on joining a host of A-List stars at Vanity Fair's bash on Sunset Boulevard on March 3, but dozed off instead of changing her outfit when she returned to her hotel.

She explained: "I had plans because the Vanity Fair party is very exciting and everyone goes. I got back to my hotel room to change, took the dress off, got into someone's coat and ended up falling asleep in the coat. Someone woke me up like 'D'ya want to get changed to go to the party now', I was like 'I kinda just want to stay here.' So I just ate pizza and fell asleep."

Watson - who was catapulted to the spotlight in the Harry Potter films as Hermione Granger - presented the Best Visual Effects Award to the Gravity team alongside Joseph Gordon-Levitt at the Academy Awards, and although she was initially excited, after releasing how many people would be watching the show her nerves began to creep in.

Speaking on The Ellen DeGeneres Show, she said: "[It was my] first time at the Oscars, it was very exciting. I thought the show was amazing. I was doing fine actually, I wasn't that nervous at all. Joseph was holding my arm before we were meant to go out and I was like 'You know what, I feel so grateful to be here and this is amazing, I actually feel really calm.' He was like 'Yeah, this is fine and this a great experience and only like a few billion people will be watching us in two minutes.' I was fine [gasps] and was fine, and now I feel so un-fine, so thanks Joseph for that."