For most of her career the actress has kept her clothes on for movie roles that have seen her play a string of prim - if a little geeky - characters such as Miss Congeniality.

But now, aged 44, she has appeared in her first nude scenes in her new film The Proposal.

Bullock joked that that she'll be stripping for more roles following the romantic comedy's runaway success. The Proposal, debuted at the top of the U.S. box office and sees her star alongside Ryan Reynolds, the husband of Scarlett Johansson.

Speaking yesterday, Sandra said appearing in the buff helped the film do well in America and pledged to bare all well into old age. She said: 'Box office like this - I’m going to be naked in every single film!
 'I’m going to be 70 years old - everything like hanging down - and I’m just going to walk by in random people’s films.'

She continued: 'Come on, can you imagine me at 70, walking naked in who’s film? Zac Efron! Zac Efron doing a big film – there I am, running naked in the background.

'Just back and forth until someone notices. Big box office - they’re all going to want me in their film!'
The actress went on to reveal the key to ‘bringing in the money’ is not filming steamy sex scenes - but by being naked and funny.

She said: 'If you’re naked and you’re trying to be sexy - you don’t really make as much money as if you’re naked and you’re funny.

'And Will Ferrell has been onto that for quite some time. Have you noticed how he drops his trousers in every single film? I’m going to do that from now on. Action film - all naked!'

The Proposal took in a whopping $34.1million to open as the weekend's No 1 movie last month in the U.S. alone

Editor: Delighted for her - we've always liked Sandra Bullock!