Kate Beckinsale says she strips for her husband via an internet webcam when she is away filming.

She says the nightly sessions help keep the passion alive during long trips away from director Len Wiseman.

Kate, 32, told Playboy magazine: "It was Len's idea and he set them up. He tells me what to wear each evening. It really helps our relationship.

"There's no way we are keeping it clean. That's the whole point. It's just like when you get a photocopier and you just have to do one of your bum. It's just one of those rules of life."

But Kate says she draws the line at dressing up as Wonder Woman for her sci-fi fan husband of 19 months.

She added: "I know there were rumours about that but I don't. My husband may be a geek but he's not that bad."