The pair were filming a steamy scene for new movie Friends with Benefits, when she was suddenly overcome by the urge to nap.
She told Total Film: 'Towards the very end, we were shooting the lovemaking scene at his father's house. It was like an 18-hour-long day and 17 hours into it, I was laying there and he was kissing my back and I was like: 'I'm just going to close my eyes for a minute.' Next thing I know you're like: 'OK, we're done!' I literally took a nap!'
And Trousersnake revealed there were so many sex scenes involved that they postponed doing them until the end of the filming. 'We wanted to push it to the end because you're like: 'Oh man, we're going to have to do a lot of stuff’. It was two five-day weeks with a couple of days to just try stuff out. Some of it made the movie.'