04/22/2010 AT 10:00 AM ET
If only there were a magic spell to make yourself disappear.
Rupert Grint, who’s played Harry Potter’s devoted pal Ron Weasley onscreen for the past nine years, recently watched his first-ever sex scene in a movie – with his parents at his side.
“It was agonizing,” the embarrassed English actor, 21, reveals to London’s Mirror. “The scene s quite tastefully done, but it’s not the sort of moment you really want to share with your mum and dad.”
And the reaction of the folks’? “When the scene arrived we all sat there not really saying anything.”
Grint says his shocked parents didn’t know his gritty new film about sex, drugs and stolen cars, Cherrybomb, even included such a naughty scene. Luckily for the young redhead, “Afterwards nobody talked about it, which was kind of a relief.”
Referring to his butt in the British vernacular, Grint says, “Obviously, I really didn’t want my bum up there on the screen, but the scene isn’t too graphic and most of it is suggested rather than seen.”
Even so, he admits, “But you do feel very self-conscious. It was more embarrassing for Kimberley [Nixon, his costar, 24], because a lot more of her body is shown. But you just have to get into that moment and get on with it.
And if he had to do it again – would he bare all for another racy scene?
“Now that I’ve done one, next time I ll be totally fearless,” he says with a smirk. “Or at least less nervous.”