Jessica Biel has admitted that she regrets taking her top off for a US men's magazine when she was only 18-years-old.

The Easy Virtue star - who is dating Justin Timberlake - feels she "screwed up" by letting herself be persuaded to pose topless for Gear magazine in 2000.

She says, "It was supposed to show me being sexier and more mature. The idea was: Look at me- I am a woman, growing up.

"I had male managers at the time, who were really excited about the photoshoot.

"The truth is, though, I was in way over my head. I remember calling my dad and saying: 'I screwed up. I went too far and did not stand up for myself.'"

Jessica reportedly angered boyfriend Justin recently with her saucy sex scenes in Easy Virtue.

See Jess' infamous shoot below.