Charlize Theron hates watching her own films.

The 35-year-old actress admits she finds it difficult to watch herself on the big screen - but she did enjoy seeing her Oscar-winning performance in 2003's 'Monster'.

She told German TV station TELE 5: "I hate to see myself on screen. When I did 'Monster' it wasn't too bad, because I didn't look like Charlize Theron."

The South African-born beauty had to re-watch many of her scenes in the film - in which she portrayed real life serial killer Aileen Wuornos - because she acted as a producer on the project.

She added: "During the rough cut I had to watch a lot of my scenes over and over again. I would slit my wrists if I had to watch my other films that often."

Charlize also thinks the fact that 'Monster' didn't have a big budget turned out to be an advantage.

She explained: "The fact that we didn't have a lot of money saved us, this way everything seemed a lot more authentic. With a bigger budget we automatically would have used prosthetics, but fortunately we weren't able to afford more than false teeth."