London, Oct 11 (IANS) English actress Keira Knightley has revealed she is filled with doubts and insecurities, and often questions whether she is deserving of her success.

Despite a glittering Hollywood career after taking the lead in movies including "Atonement", "Pirates of the Caribbean" and "The Edge of Love", the 25-year-old beauty has struggled to acknowledge how successful she has become as an actress, reports contactmusic.com.

"It's taken me time to overcome my own doubts and insecurities. It's been my nature not to want to believe in my own success and that I don't deserve my success. But that's something I've fought to overcome," she said.

Keira is also still terrified about starting on a new movie set.

"I'm getting better, but the terror is still occasionally there! Sometimes you have to fight your fear prior to an important scene. You don't want to make a mess of things. I try not to place so much pressure on myself now," she said.