The 22-year-old Brit revealed that she had already reckoned that questions about her thin frame were to pop up at the Italian even, and that she had had a discussion on the same with her co-stars and crew beforehand.
"It's really frustrating, and particularly when you come to Venice with a film that is an intelligent film," Contactmusic quoted her as saying.
"I think it was just a shame that that had to be brought up then, and the fact that we all knew that it was going to be brought up. We actually had a bet going. I was like 'Come on, how many times either anorexia or something about my body, are going to come up?'" she added.
Knightley further said that it was shameful that the press was more interested in questioning about her figure rather than focusing on the film's subject matter.
"I think what I want to keep it (my career) about is the work, that's all I'm interested in, and when you've got a project like this I think it's a shame to take it away from that," she said.