Kate Beckinsale has opened up about her diet and fitness regime, revealing exactly what it takes to get her honed physique.
The actress, 43, is the cover star of Shape magazine's January 2017 issue, showing off her incredible shape in a bikini.
The star dazzles in the new issue of Shape magazine
Speaking to the publication, she revealed that while she keeps on top of her fitness regime, she doesn't always find it so fun.
"I start out absolutely dreading it, do an incredibly punishing workout, bitch about it the whole time, and end up feeling 100 per cent better when I leave," said Kate.
"Working out is basically nature's antidepressant."
Kate revealed that while she loves practising yoga, it is the more intense workouts that change her body and mind.
The British actress opened up about her 'punishing' fitness regime
"Hardcore workouts have really made a big difference in my life," she said.
"I have a lot of internal energy, and intense exercise helps me channel that energy. I find balance by doing a workout that makes me pour sweat. I never was that girl before, but I am now."
Dishing on preparing for her physically demanding role in Underworld: Blood Wars, she credits celebrity fitness expert Gunnar Peterson for getting her into tip-top shape.
"I work out hard with Gunnar five or six times a week," she said.
The star had a physically demanding role in her new film
"I do circuit training interspersed with brutal cardio, such as crazy things on a nonmotorised treadmill. That part is torture. But the thing I like about circuit training is that you're never doing one thing for very long.
"You get to the point where you almost can't bear it, and it changes to something else."
As for Kate's diet, lean and clean is key.
"[My daughter] Lily and I eat clean - we have a lot of sauteed vegetables like brussels spouts and broccoli and chicken and fish," she revealed.
"Also, I don't drink alcohol. I feel [its effects] very quickly, so I've never actually had an entire glass of anything alcoholic."