Kate Beckinsale, 45, Looks 25 and Works Out Like a Beast — Get Her Secrets!

How old is Kate Beckinsale Opens a New Window. ? Whether she’s stepping out with a younger man Opens a New Window. — we’re looking at you, Pete Davidson Opens a New Window. and British comedian Jack Whitehall! — or wowing in a revealing gown on the red carpet with her toned legs, arms and abs, fans frequently wonder the  actress’ age. And time and time again, the Pearl Harbor actress — who, for the record, is 45-years-old — proves that age really is just a number.

Part of the reason she’s in such great shape: The action hero star learned a thing or two about keeping an intense fitness regimen after leading vampire flick Van Helsing and helming the Underworld franchise. A client of celebrity trainer Gunnar Peterson Opens a New Window. and a regular at his Beverly Hills studio for five-plus years, the British star is dedicated to her workouts. “Kate is a six-day-a-week person,” Peterson told Us in August 2018. “She’s definitely up there among my hardest workers. I mean every single day is push, push, push.”

“Anybody I’ve worked with, I think the reason they seek me out is because they know that we’re going to get the work done, it’s going to be safe, it’s going to be as fun as that can be and they’re not going to cut any corners,” adds the pro. “It keeps them on the straight and narrow that they hold themselves to.”

And Beckinsale, who separated from her Underworld director husband Len Wiseman after 11 years of marriage in 2015 and later divorced, goes into every session knowing what she signed up for! “I start out absolutely dreading it, do an incredibly punishing workout, bitch about it the whole time, and end up feeling 100 percent better when I leave,” she told Shape in 2016 of her days with Peterson.

Outside the gym, the mother of 20-year-old Lily (with ex and close friend Martin Sheen Opens a New Window. ) keeps it healthy on the diet front too. Reveals Peterson, “She doesn’t have a sweet tooth.” Nor does she waste calories on cocktails. “I don’t drink alcohol. I feel [its effects] very quickly, so I’ve never actually had an entire glass of anything alcoholic,” the star, who eats a predominantly plant-based diet, also told the fitness mag.

Scroll through to read more fitness and diet secrets from the ageless Beckinsale and see amazing workout and body photos!

If You’ve Got It, Flaunt It

Beckinsale knows how to show off her hard-won body on the red carpet, as she showed in a barely-there white lace dress at the Golden Globes on January 6, 2019.

Credit: Rich Fury/Getty Images

Strengthen Your Core

The actress posted a video of herself performing diagonal cable pulls on a water wheel on Instagram on December 29, 2018. “If I’ve been especially well behaved sometimes, as a treat, @gunnarfitness lets me help with the @lakers manual toilet flushing system,” she joked in the caption.

Credit: Courtesy Kate Beckinsale/Instagram

Go Big or Go Home

For Beckinsale, no workout move is too difficult to try — including the sled push she posted on Instagram on December 15, 2018. Indeed, her trainer Gunnar Peterson tells Us, “She’s definitely a do-your-own sets, do-your-own stunts kind of girl. She gets through it. She can do it with a poker face. But she is working.”

Credit: Kate Beckinsale/Instagram

Embrace Yoga for Targeted Strength

“Kate likes the pure yoga,” Beckinsale’s yoga instructor Mandy Ingber has told Us of the star, who stunned at the GQ Men of the Year Awards on September 5, 2018. “The yoga gives you the strength and muscle toning without the sort of overly worked out look, which I think is sort of why people come to me. Because of my clients — their bodies look naturally muscular but not overdeveloped. More like a dancer’s body.”

Credit: Dave Benett/Getty Images for Hugo Boss

Get a Workout Buddy

Beckinsale posted a video on Instagram on August 3, 2018, of a friend pushing her legs down repeatedly, as she stopped them before her feet hit the ground and raised them back up. “Women. The minute the men leave we get right back to pushing each other’s feet and talking about dicks and literature,” she joked of the core-strengthening move.

Credit: Kate Beckinsale/Instagram

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