Ananova:

Kate Beckinsale says she still has "fat ass" days when she is so insecure about her looks she can't leave the house.

The actress, 32, said: "It feels like I have somehow managed to cover up the mis-shapen strange child for an evening and fooled everybody.

"But I have days when I feel great and then I have days when my ass won't fit in my jeans and I won't leave the house.

"I guess when you become an actress you hope those fat ass days will go away, but of course, they don't."

In her latest role in Underworld: Evolution, sequel to vampire thriller Underworld, the actress and mum of one squeezes herself into a latex catsuit.

She said: "You forget you're wearing it after a while, but other people sure don't."