Keira Knightley cried on being followed by paparazzi

London: Actress Keira Knightley says she cried when she was first followed by paparazzi as she realised it meant the end of her private life.

The 28-year-old, who started garnered attention after starring in 2004 film `King Arthur`, said she soon knew to be in the film industry she must sacrifice the mystery of her private life, reported Contactmusic. "The first time I was stalked by cameras, I was in tears. It started after the premiere of `King Arthur` - 10 people were outside my house. The machine that allows you to make movies, the trade-off, [requires] you to sell it. Selling it means making yourself a public figure. You can`t cultivate the mystery. My problem is I like mystery," she said. While she enjoys being an actress, Knightley - who is engaged to musician James Righton, 29 - is aware of how insecure her career is. "It`s a very insecure profession. So when I started getting work, it was like this tiny space opened up and I need to jump in and go with it. It could all go tomorrow. I`m not sure I can define success. I think if I can get to the end of my life having hurt as few people as possible, making sure the people who mean the most to me know they`ve been loved, I will be happy. Success in work, whatever work, will come and go." PTI