Sienna Miller and Keira KnightleySienna Miller may have become close to co-star Keira Knightley on the set of their new love-triangle film The Edge of Love but now professional jealousy may be set to push them apart again: according to the Daily Mail, Sienna is jealous that Keira is in final-stage talks to play Eliza Doolittle in the remake of classic musical My Fair Lady.

A source close to the actress told the newspaper that Sienna had her heart set on the role and has been taking singing lessons to improve her chances: “She even told Keira she wanted the part when they were shooting The Edge of Love, but Keira went for the part anyway and now it looks as if she’s got it.

“To say Sienna is a bit annoyed at her doesn’t come close to describing it.”