Cameron Diaz has revealed she finds it difficult to commit to filming movies and as a result has lost out on some major roles.

The actress admitted her unreliability has meant other stars have gained good parts that otherwise could have gone to her, and blames it on her being spoilt.

She said: "There are a lot of great roles out there but you know my problem? I'm really bad at commitment. I just hate committing myself to anything. I'm terrible at making plans. I have no idea where I want to be.

"It probably comes from me being a total spoiled brat and always getting my own way."