Hollywood stars' most awkward moments

Hollywood stars have revealed the one moment where they felt most awkward when filming a movie -- doing a sex scene.

Actor Leonardo DiCaprio explained how he had a difficult time doing a sex scene with actress Kate Winslet in Revolutionary Road as she freaked out that her husband was watching.

'It was certainly a difficult time. She was really worried that Sam wasn't bothered by the fact that his wife was making out with another guy right in front of him,' the Sun quoted DiCaprio as saying.

Twilight star Robert Pattinson remembers his moment of awkwardness in movie Remember Me with co-star Emilie de Ravin.

'When you end up doing it, you have this little patch on your privates.

'I didn't really tape it up properly, so I'd spent so long taping it round myself and then literally it falls off within one second and it's taped to the sheet.

'And you realise the whole crew are looking directly at your butt crack,' he stated.

Harry Potter star Rupert Grint found his sex scene in Cherrybomb with co-star Kimberley Nixon a bit traumatic.

'I had my first sex scene and it was a traumatic experience. But Kimberley found it a lot more embarrassing. I think it's easier for boys. It was her first too so we were in the same situation,' he said.

Actor James Franco said his outgoing co-star actress Julia Roberts in Eat, Pray, Love was very shy about doing a sex scene.

'She is very, very outgoing. But I think she'll also admit pretty freely that she doesn't love to do love scenes and actually was charmingly shy when we had to do them,' he revealed.