"I literally had no life outside of acting, and I just wanted to go off and not be 'on' all the time, not be photographed... I once went to the Glastonbury music festival and was completely surrounded by packs of paparazzi the entire time, so I ended up sitting in a trailer, unable to go out." Actress Keira Knightley explains her decision to take a nine-month break from Hollywood in 2008.