The 'Hunger Games' star admits she suffers from such strong self-doubt that she always fears each job will be her last.
After watching the movie - which is based on Suzanne Collins' book trilogy - for the first time at last night's (13.03.12) Los Angeles premier, she confessed the only part she didn't like about it was herself.
She said: ''I mean, it's always hard for me, watching, because I think I'm a horrible troll and I'll never work again. But overall I think everyone else in the movie is fantastic.''
The self-depreciating actress - who was nominated for an Oscar for her lead role in 2010 film 'Winter's Bone' - believes she has a whole host of flaws including an inability to sing, whistle or dance.
She said: ''You should see me dance. I'm terrible at everything. God, this is really sad. I can't do anything. I'm like short-selling myself, with like crying. I'm like, 'I fake everything. I'm not a good actor. Next question!'''
But despite her insecurities, 21-year-old Jennifer's star is on the rise meaning she started to attract the attention of the paparazzi.
She told MTV News: ''I get photographers hiding in my bushes! We're way past autographs, we're into being stalked and followed.''
In the meantime, Jennifer is waiting with baited breath to see what fans think of her portrayal of heroine Katniss Everdeen.
She added: ''Everybody's been really nice. But the movie's not out yet, so we'll see.''