'Laughing in bathrooms with friends': Kate Beckinsale, 43, shows off her incredible figure and tiny waist in sexy lingerie selfie

By Kate Thomas And Ciara Farmer For Mailonline

Published: 06:43 EST, 25 January 2017 | Updated: 11:15 EST, 25 January 2017

She's in fantastic shape and boasts an enviably toned figure.

And Kate Beckinsale sent her followers wild with envy with a sexy mirror selfie taken on a break during her Shape magazine shoot last month.

The 43-year-old Underworld star was seen posing in a black crop top and white pants as she captured the candid snapshot.

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Wow: Kate Beckinsale sent her followers wild with envy with a sexy mirror selfie taken on a break during her Shape magazine shoot last month

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Oh to be 43 and look like THIS. Kate Backinsale proudly shared a selfie of her rock solid abs with her 570,000 Instagram followers earlier today. The British actress can be seen sporting a L*Space bikini top in the revealing snap, paired with some mismatched white bikini briefs.

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For anyone not jetting off to the Caribbean anytime soon (us neither, we feel your pain) opt for a crop like Kate's to wear by night. It will look fabulous with high-waisted, wide-leg trousers. Supermodel Kendall Jenner often wears her crop tops with distressed boyfriend jeans or even sporty tracksuit bottoms.

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Kate showecased her amazing, gym-honed body in the tiny top, with crossover straps emphaising her tiny waist.

'Laughing in bathrooms with friends', the actress captioned the image.

Never one to take herself too seriously, Kate also uploaded a close-up selfie of herself rocking a cosy knit.

She joked: 'You can think you've had a reasonably good day until you get undressed at night and two small pieces of chicken fall out of your polo neck'. 

In another snap earlier this month, Kate was seen posing with her hands aloft her head while pouting into the distance, a stance she deemed as 'sniffing her armpit and twisting her head off'. 

Oops: Never one to take herself too seriously, Kate also uploaded a close-up selfie of herself rocking a cosy knit, joking she had secretly stashed some chicken inside 

Taut and toned: Kate also poked fun at herself earlier this month as she shared another sizzling behind the scenes shot from her Shape magazine shoot

Kate looked incredible in the image in which she wore just a white bandeau top with little else, to best show off her fantastic frame.

Her incredibly taut stomach was envy-inducing as she flaunted rippling abs and her tiny waist, honed by hours of hard work in the gym.

The stunning star's cascading brunette locks fell in a straight style down her back while she held her hands up to push her hair off her face. 

Despite pouting into the distance in the perfect modelling pose, she was determined to poke fun at the pose. 

New attitude: The 43-year-old Underworld star was seen posing with her hands aloft her head while pouting into the distance, a stance she deemed as 'sniffing her armpit and twisting her head off'

She added a caption on the image reading: 'It's Monday morning . Sniff your armpit and then try to twist your own head off who's with me'. 

As Kate sizzled in a bevy of snaps, she gave an accompanying interview to the health magazine about her lifestyle and her body. She said she steers clear of alcohol and has never had an entire glass of anything alcoholic.

'I don't drink alcohol,' she told the publication, 'I feel [its effects] very quickly, so I've never actually had an entire glass of anything alcoholic.'

Teetotal: In her interview, she said she steers clear of alcohol and has never had an entire glass of anything alcoholic

The Love & Friendship star revealed the secrets of her enviable figure, which include five or six punishing works outs a week with a personal trainer ahead filming the fifth installment of Underworld franchise, Blood Wars.

She explained she would rather exercise first thing: 'I basically wake up, eat breakfast, and then work out. I prefer to get it done in the morning.

'That said I don't naturally get up early. It would be much better for me if the entire world went to bed at 4 am and woke up at noon. But it doesn't, so I'm usually staggering around first thing.'

The SAG Award nominee said she has learned to appreciate breaking into a sweat during her hardcore workout regime.

'Hard-core workouts have really made a big difference in my life. 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,' she told the magazine.

The mother-of-one explained how she stays in shape by changing up her exercise pattern.

Tricks of the trade: The Love & Friendship star revealed the secrets of her enviable figure, which include five or six punishing works outs a week with a personal trainer ahead filming the fifth installment of Underworld franchise, Blood Wars 

'I do circuit training interspersed with brutal cardio, such as crazy things on a nonmotorized 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.'

Kate - born Kathrin - shares daughter Lily with her ex-partner Michael Sheen - and they will celebrate her 18th birthday next month. 

Glowing: Kate - born Kathrin - shares daughter Lily with her ex-partner Michael Sheen - and they will celebrate her 18th birthday next month

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