Rising star Sienna Miller hopes her CASANOVA co-star Heath Ledger enjoyed kissing her more than Jake Gyllenhaal.

Ledger told 24-year-old Miller he found filming intimate scenes with Gyllenhaal for Oscar-nominated movie Brokeback Mountain uncomfortable, so she is confident her performance was more to his liking.

She says, "He told me about kissing Jake, so if he thinks that was better I'm in trouble!"