Keira Knightley is happy to bare her breasts on camera — because they are "so small".
The 27-year-old actress — who is engaged to Klaxons star James Righton — has a strict "no bottom" clause in her contracts but does not mind stripping above the waist because she thinks people aren't very interested in her figure.
She said: "No bottom half! I don't mind exposing my breasts because they are so small — people really aren't that interested!
"[But] I think it's much easier as you get older. You can say, 'No.' 'Yes.' 'No.' "
The Anna Karenina actress admits she is usually amused to see movie bosses "pencil in" curves for film posters, but she was furious when she was left with "droopy tits" on the promotional materials for the 2004 production King Arthur.
She told the December issue of Allure magazine: "They always pencil in my boobs. I was only angry when they were really, really droopy.
"For King Arthur, for a poster, they gave me these really strange droopy tits."A... I don't have tits anyway and B... they digitally made them, and I thought, 'Whoa!' It's my face on that poster. If you are going to make me fantasy breasts, at least make me perky breasts'."