Emma Watson had to hold back an attack of the giggles when she saw her Harry Potter cast-mate Daniel Radcliffe perform naked in the play Equus.
"I saw it in London, it was amazing," says Emma. "It sounds very strange but it didn't feel weird because it was part of the story and the play so it wasn't like, 'Oh my God he's getting his kit off!' It was like you were in what was happening."
"But yeah, I did get a bit giggly and embarrassed. I'm not going to lie."
Emma also admits she's feeling nervous about kissing her co-star Rupert Grint in the next Harry Potter film.
"That is a little bit scary because he's been my friend for like forever and then having to kiss him is going to be very strange."
Nude plays, kissing scenes… we're just dying for a Harry Potter off-screen romance! It's happened to plenty of other co-stars. Check out our co-star to couple gallery to see how it's done.