Winona Ryder has spoken of the destructive impact of fame - saying it can "drive a person crazy".
The actress was at the Toronto International Film Festival to promote new movie Black Swan, the thriller starring Natalie Portman as a ballerina in a New York ballet company.
"To be looked at and judged, you read something about yourself and you think 'ok, that's who I am, that's how I should be', it gets very confusing", she revealed.
Laughing, the star added: "(It) can drive a person crazy, it can!"
Winona plays a prima ballerina, pulling off the role without a background in dance.
"I haven't had any experience. I've been to the ballet, I saw The Nut Cracker when I was small but that's it!" she said.
"We did a photoshoot before I started filming to be on posters when Natalie walks by and even that was so hard to keep those positions."
The actress insists she isn't competitive when it comes to getting roles in Hollywood.
"I've been asked about ambition before and I don't feel that ambitious because I started so young and it was very fun.
"Both Natalie and I started so young and we didn't really have to go and pound the pavement that much, we don't have that innate ambition of people that start later in their careers", she said.