Actress Lindsay Lohan is convinced she'll return to the big screen in a breakthrough performance - insisting she's "up for the challenge" posed by critics brushing her off as a party girl.

The Mean Girls actress has had a series of box office flops since the 2004 film.

She became infamous on the Los Angeles party scene and entered a rehabilitation facility three times last year, but now insists one year later that she's ready to refocus on her movie career.

She says, "I have goals and I'm working to achieve them. I'm not hanging out with people who are out every night getting f**ked up... I think at this point (the media) is like, 'Let her do what she's going to do. We've seen her do enough.'"

And Lohan hopes loyal moviegoers will return to see her on the big screen.

She adds, "I know people wouldn't have gone to see my movies if I didn't make them laugh or make them cry. I think it's a matter of finding the right thing. I'm sure my first thing back might not be that, but eventually it will come.

"That's what this business is like. It builds you up to take you down and then sees how far you can come back. I don't really worry though. I'm a fighter. I'm up for a challenge and I wont settle."