Keira, Sienna hold eating competition

Keira Knightley and Sienna Miller have been having competitions to see who can eat the most. The slender beauties - who are currently in Wales filming new movie The Edge of Love - have stunned insiders on the set with how much food they can both consume.

A source said, "Both Keira and Sienna have bigger appetites than many of the men on set. Keira was told to beef up for the role and she and Sienna have been having food competitions to see who can eat the most. At the moment they are on a curry diet where they can have curries for lunch and dinner, and eggs Benedict for breakfast."

Despite her healthy appetite, Keira recently had to quash claims she was anorexic. The British star sparked concerns about her weight last year after she turned up at a London film premiere looking very thin.

She said, "After the premiere, people said to me, 'How does it feel to be called anorexic?'. I'm not saying there aren't people in the film industry that suffer from it, because I am sure that there are, but I'm quite sure I don't."

However, Keira admitted the eating disorder runs in her family. She said, "I've got a lot of experience with anorexia - my grandmother and great-grandmother suffered from it, and I had a lot of friends at school who suffered from it. I know it's not something to be taken lightly and I don't."