Kate WinsletKate WinsletYou thought being a movie star was all about fame, money and glamour, right?

Kate Winslet would beg to differ, saying there's one part of the job she just can't stomach.

"As an actress, when you have to take your clothes off and get naked, it's really, really terrible.

"It's a terrible day and when you wake up you feel sick and you think to yourself: 'I must be absolutely mad and I must remember not to do this ever again.'"

Kate was speaking at the premiere of her new film Little Children. The 31-year-old dazzled in a black-and-white floral Ben de Lisi dress.

In the movie, Kate plays a mum trapped in suburbia, who has little interest in her kids and cheats on her hubby with a young dad she meets in a playground.

A far cry from real life, where Kate is happily married to director Sam Mendes and is a devoted mum to Mia, six, and Joe, three.

Kate admitted she found the role tough: "There was a part of me that thought: 'Can I do this?' But then I decided I was up to the challenge and said yes.

Wise girl - Kate's been tipped for an Oscar for her performance. But the ever modest actress said she thought it was "pointless" to worry about winning. She's been nominated for an Oscar four times so far.