Shailene Woodley says watching 'Jurassic Park' ''screwed her up''.

The 'Divergent' star claims Steven Spielberg's 1993 classic movie - about a fictional island where dinosaurs are resurrected - left her with nightmares for years after she saw it.

She told RedEyeChicago.com: '''Jurassic Park' screwed me up as a child. That recurring nightmare is constantly of a giant Tyrannosaurus Rex eyeball in my window as a kid.

''I slept on my parents' floor for maybe three years because of 'Jurassic Park'.''

Shailene, 22, could now find herself having nightmares about her time on 'Divergent', since she became the butt of co-star Theo James' jokes.

He explained: ''It's helpful to joke [on set] and remember you're not solving world hunger. I pulled down Shai's pants mid-scene. Luckily, I don't think the cameras were rolling!''

Theo - who is dating Irish actress Ruth Kearney - also joked he kept making Shailene ''practise'' their kisses.

He added: ''I made her practise the kissing scene as much as possible. I'd say, 'Listen, tonight after dinner, can we just go over it again?' ''