Stars of The Proposal turned out for the London screening of the blockbuster that has opened at number one at the stateside box office.

Sandra Bullock plays a pushy boss who forces her colleague, played by Ryan Reynolds, to marry her so she won't be deported.

Speaking of the film's sex scene which took three days to shoot, Sandra joked: "We tried not to be fully naked just for the crew, you know they had to have lunch, they had to go home and sleep and we wanted to make sure that still happened."

Ryan - who is married to screen beauty Scarlett Johansson - added: "Well there are worse jobs but it was definitely an exercise in having the shame ripped out of your soul."

On seeing his ripped torso on screen, he added: "It was a shock, I think it was more of a shock for someone like my mother."

The Proposal opens on July 22.

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