Kate Beckinsale doesn't want to be too skinny in Underworld catsuit

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Kate Beckinsale has revealed she eats more when she's getting ready for an Underworld movie - because she likes to fill out her catsuit.

The British actress made her debut in the first film in the vampire franchise in 2003 and will soon be seen in the fifth instalment, Underworld: Blood Wars.

Kate Beckinsale (Jordan Strauss/Invision)
Kate Beckinsale (Jordan Strauss/Invision)

She told The Sun that instead of trying to shed the pounds ahead of filming, she actually indulges more.

Kate said: "Nobody wants to be terribly skinny with a catsuit hanging off them.

"I eat more when I'm in catsuit-mode or I'd never get through the gym sessions."

She added: "There's always the fear I'll overdo it, though, and it's a bit like putting on your wedding dress every five years or so. Does it still fit or am I fat?"

Kate, 43, has opened up about her love of fast food on Instagram, sharing a picture of herself looking delighted as she stared at something alongside a waiter.

The actress wrote: "What had happened : he had just brought us chips.

"What it looks like : very overexcited parents seeing their new baby for the first time."