Surprisingly epic: Kendall Jenner's Bikini Body Evolution

Sure, Kendall Jenner is an in-demand, professional model. But while she may have been blessed with great genetics, that doesn’t mean her physique has looked the same since she started walking the runways or posing in bikinis on trips with her ultra-famous family.

Always tall and slender, it’s still clear from Kendall’s earlier days of screen time on Keeping Up With the Kardashians to her time now as a well-established pro posing for Victoria’s Secret, La Perla and more that she’s dedicated to taking care of her health and body.

And while she’s admitted she doesn’t love cardio, she’s always up for doing toning and strengthening exercises — especially on her favorite body part to work out. “Sometimes when I’m watching TV, I think to myself, ‘I should be doing crunches and sit-ups right now,’” she wrote in 2017 on her app and website of her abs exercises. “Then I get off the couch and do it.” She also revealed her 11-minute at-home routine, which includes planks, crunches, leg lifts and other standbys.

Like her sisters Kim, Khloé and Kourtney Kardashian and Kylie Jenner, she’s worked out with various A-list trainers, including Gunnar Peterson, and has tried a wide variety of exercise techniques including HIIT circuits, barre and boxing.

“People will find it hard to believe,” Peterson told Us prior to Jenner’s 2016 Victoria’s Secret fashion show, but “that girl squats, dead-lifts and does pull-ups.” A few other pre-catwalk fitness tricks she has up her sleeve? “A lot of sled-pushing, a lot of lateral banded work up and down the track,” added Peterson, “and a lot of very high-intensity cardio intervals.”

And like any fun-loving supermodel, Kendall loves to show off her hard work by wearing bikinis at the beach, poolside and in mirror selfies.

The 818 Tequila founder has also turned to fitness trainer Autumn Calabrese to stay in shape.

“When I was training Kendall, she looked to me to develop the approach. My fitness programs are anywhere from 30 minutes to an hour in length,” the Revenge Body instructor exclusively told Us Weekly in September 2019, noting they trained three or four hours a week using cardio strength training. “There is a modifier in every program, so no matter what your fitness level is, you can push to your max.”

Calabrese broke down exactly how to get Kendall’s sculpted six-pack abs. “Abs are made in the kitchen, you’ll never out-train a bad diet,” she told Us. “In addition to that, pay attention to holding your stomach in throughout the day. Believe it or not we walk around with our abdominals disengaged a lot. You can also focus on planks, plank knee tucks, side planks and leg raises.”

Scroll through to see Kendall’s bikini body evolution:

Credit: Albert Michael/Startraksphoto.com

Sin City Stunner

Kendall struck a pose in a black Kardashian Khaos string bikini while visiting the pool at The Mirage hotel in Las Vegas in June 26, 2012.

Credit: KISS/RAMEY PHOTO

Slender Footballer

Wearing a printed turquoise two-piece, the reality star hit the beach to play some football with her nephew, Mason Disick, in Malibu in on July 14, 2012.

Credit: X17online.com

Bodyboarding Babe

To celebrate the 4th of July in 2013, Jenner went bodyboarding with friends in a patriotic swimsuit in Malibu. “I want to be more high fashion; I want to be more editorial, but hopefully I’ll just prove myself,” she told V magazine in June 2013 of her modeling dreams.

Credit: X17online.com

Patriotic Swimwear

For a game of beach volleyball in Malibu on July 4, 2013, Kendall put on a pair of tiny denim shorts that further defined her small waist. She also wore a long white sweater over her American flag bikini.

Credit: Courtesy of Kendall Jenner

Greek Goddess

“Mellow moods got me, darlin,” Kendall captioned two photos on Instagram during her family vacation to Greece on Apr. 27, 2013. In the photos, the Keeping Up With the Kardashians star shows off the front and back of her tiny white and black strapless bikini.

Credit: Michael Simon/Startraksphoto.com

Poolside Pose

She gave a flirty pose to cameras while sitting poolside in a white fringe string bikini. The aspiring model sipped on a pink lemonade while sitting on the edge of a pool in L.A. on July 17, 2013.

Credit: Brian Prahl/Splash News

Pricey Style

Kendall sported $100 Mikoh bikini bottoms during her family vacation in Greece on April 27, 2013. “Modeling is my number one priority — one hundred percent,” she told the May 2013 issue of Cosmopolitan.

Credit: Courtesy of Agua Bendita Swimwear

Swimsuit Model

In May 2013, the reality star appeared in a swimsuit campaign for Agua Bendita wearing a floral pink and blue bikini. Kendall told the June 2012 issue of V magazine that she’d “probably” quit TV to for modeling.

Credit: Courtesy of Kendall Jenner

Barely-There Bikini

For a Throwback Thursday post on Instagram, Kendall posted a bathroom selfie with the caption, “#tbt in Australia shooting with @nomadrj all covered in mud ON my birthday #Champ #GreatMemories #AintComplaining.” In the photo, the reality star showed off her mud-covered bod in a strapless nude bikini.

Credit: PacificCoastNews.com

Business Casual

Kendall posed for the camera while modeling a printed bikini for Agua Bendita swimwear in L.A. on May 5, 2013. “I’m constantly criticized for being too skinny,” the 5-foot-10 model told the April 2013 issue of Harper’s Bazaar Arabia. “I’m trying to gain weight but my body won’t let it happen. What people don’t understand is that calling someone too skinny is the same as calling someone too fat. It’s not a nice feeling.”

Credit: PacificCoastNews.com

Monokini Beauty

The model showed off her slim figure in a colorful monokini while shooting for Agua Bendita swimwear in L.A. on May 5, 2013. “It’s always been kind of a dream of mine,” Keendall told E! News in April 2013 of modeling for Victoria’s Secret. “It’s a very great thing to do, and it’s something I’d love to do.”

Credit: Courtesy Agua Bendita

Time for a Swim

Flaunting her thin body in tiny shorts and a pink bikini top, Kendall posed for Agua Bendita 2014’s “Time for Us” collection.

Credit: GQ magazine

Cover Star

Kendall covered GQ magazine’s May 2015 issue in a tiny white bikini and a superfluous jean jacket.

Credit: KCS Presse/MEGA

The Good Life

A pink frilly number suited Kendall just fine while she splashed around on a yacht in Antibes during the Cannes Film Festival on May 23, 2017.

Credit: KCS Presse/MEGA

Sun Smart

Two days later, on May 25, 2017, she used an oversized shirt to protect her shoulders from the rays on a boat in Cannes. Her sister Kourtney Kardashian, with boyfriend Younes Bendjima, spent the day afloat with Kendall too.

Credit: Courtesy Kendall Jenner/Instagram

Smooth Sailing

The yacht-dweller used a camera instead of her phone to capture her Instagram image in a small yellow bikini in November 2017.

Credit: Courtesy of Ardene/MEGA

Striking a Pose

In March 2019, the star showed off her enviable muscles while modeling a look from the Kendall & Kylie collaboration she her sister Kylie Jenner did with Canadian fashion brand Ardene.