Actress Gemma Arterton has revealed she punched a homeless man in the face after he squeezed her bottom.
The star, who said she utilised some of the physical training she has done for her new movie Hansel And Gretel, said she ran off after she realised what she had done.
Arterton, 27, made her confession as she was interviewed for this week's Graham Norton show which is to be screened on BBC1.
Speaking about the incident, she said: "I was in one of those ATM cash machine rooms and there was a tramp in there. He kept looking at me and then he grabbed my bum really hard.
"I turned round and properly punched him in the face. I then realised I'd punched a tramp in the face so I ran. Thank God he didn't punch me back. I actually felt quite bad about it."
Arterton, who is reported to have recently split from her husband Stefano Catelli, said she was attracted to her latest movie role, inspired by the Brothers Grimm fairytale, because of the action.
"It's one of the reasons I wanted to do the film because I've always wanted to punch people. It was fun. I had to do lots of training because I had never done anything like it before and I loved it, absolutely loved it."
Arterton told how she has been confronted by real-life violence before she found fame as an actress when she worked in a karaoke bar.
"It was a bit dodgy and occasionally I would get threatened. I would get asked for My Way 10 times a night and when I said no, this guy pulled out a crowbar and went for me. Honest Dave, the owner, saved me and said that if that happened again I should sing My Heart Will Go On by Celine Dion because it really chills everyone.
"It was like a soothing balm over all the drunken gangsters and from then on when it got a bit fraught he would say, 'Gemm, do Titanic'."