British actress Keira Knightley confessed that she giggled her way through the love scenes with co-star Dominic Cooper in her latest movie The Duchess.
The 24-year old actress revealed she laughed when Cooper had to act in a nappy, thesun.co.uk reports.
Said Knightley: "During the sex scene I was luckily fully clothed, but he had to wear this skin-coloured nappy. Sex scenes are never the easiest and you're meant to be very supportive of each other, but I just completely lost it. The director had to tell me, 'Pull yourself together'."