Sandra Bullock feared her close friendship with Hollywood pal RYAN REYNOLDS would be destroyed - after they stripped naked together for a scene in THE PROPOSAL.

The Speed actress has known Reynolds for nine years and the pair has enjoyed holidays together with Bullock's husband Jesse James and the Wolverine star's wife Scarlett Johansson.

Their close partnership was put to the test when they were forced to bare all in a sex scene for their new movie.

Shooting lasted three days - but Bullock insists filming the scene with such a close friend helped her make it more convincing.

She tells WENN, "You know, when I read it, it read hilariously... we knew we had to be true to it, we didn't pretend to shoot naked because, like, when you see someone get out of a bed with a sheet... you go 'it's a sheet!' So we knew that in order for it to be truly funny we had to do it naked and it was three days of stunts - it was virtually naked stunt work.

"But I did it with a friend and he was very protective over me, and I of him, and thankfully our friendship left stronger and not destroyed... as it could have been."