Daniel Radcliffe feared he would get an erection while shooting his first sex scene

'Harry Potter' star Daniel Radcliffe has admitted that he feared he would get an erection while shooting his first sex scene.

18-year-old Daniel confessed that he took a fancy to his co-star, Teresa Palmer; and was nervous about getting too sexually aroused when they were filming their sex scenes...

Radcliffe told British newspaper 'The Guardian': "Teresa is beautiful, so I was sort of worried about, you know, certain things. But kissing someone on camera is just not sexy, no matter how attracted to them you are.

"No matter how beautiful they are, when you're surrounded by crew who are taking measurements of the focus and making sure you're in the right light, it becomes totally clinical. And clinical is not a word I would associate with any good sexual experience."

However, Radcliffe said that he loved shooting the "clumsy" sex scene for his new movie, which is about four orphan boys who want to be adopted by the same family - because it reminded him of his first sexual experience.

He said: "I love that scene! It was so totally clumsy. It's so gwhen she asks him to kiss her neck and play with her tits at the same time. It's that first time experience when you're like, 'OK. What's this hand doing? What's that hand doing?' Trying to coordinate all those things at once is an absolute nightmare. It's a sex scene that's not sexy. It's clumsy and sweet."

Daniel Radcliffe added that he didn't have any issues appearing totally naked for the play 'Equus', in London - earlier in the year.

He said: "If the script says I have sex, I have sex. That's just what you do as an actor."