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Katherine Heigl Shares Post-Baby Bikini Photos of Her Weight Loss Transformation

This incredible result is from a workout app.

By Adele Chapin Feb 20, 2018, 11:28 AM ET

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Just in time for #TransformationTuesday, Katherine Heigl posted a seriously inspiring before-and-after photo collage on Instagram revealing her fitness journey, post-baby. To recap: the actress gave birth to her son Joshua last January. Now, more than a year later, she shared with her followers how she got back in shape after pregnancy — complete with bikini progress photos.

"It’s been almost 14 months since Joshua Jr was born and it has taken me about that long to really get back in shape," Heigel wrote on Instagram. As if that's not relatable enough, the method Heigel used isn't what we usually think of when we think of celebrity fitness. Instead of taking two-a-day Soulcycle classes or working with a trainer, Heigel says she achieved these incredible results using a fitness app on her phone and working out in her bedroom at home.

She wrote: "I found a fantastic app called #sweat that features several different #bbg programs you can choose from and makes it incredibly easy to do anywhere, which for me means in my bedroom at home!"

Itâs been almost 14 months since Joshua Jr was born and it has taken me about that long to really get back in shape. The first pic was taken one month after he was born. The second pic was taken almost a full year later and the last pic was taken this weekend. I wish I had a few from in between the first and second so you could really see how slow my progress was but alas...I was busy covering it all up those months, not posing in my unders! Anyway, I have a beach vacation coming up, a new job I start filming in April and my deep desire to feel fit, strong and sexy propelling me forward the last two months to finally loose the last of my baby weight and do a deep dive search for the ab muscles I knew were buried under that belly somewhere! I was wholly and totally inspired by Miss @rachparcell and the before and after pics she shared after taking the #bbg challenge. I had never heard of it but she looked so damn great (she had her baby just a few months before me) that I had to check it out. I found a fantastic app called #sweat that features several different #bbg programs you can choose from and makes it incredibly easy to do anywhere, which for me means in my bedroom at home! I wonât lie, the workouts are real ass kickers but the progress Iâve made in only 5 short weeks has kept me motivated and inspired to keep going! I am so grateful Iâve had a full year to find those ab muscles and get my butt back up where it belongs and wasnât forced by work to snap back into shape but it is time to make the strength, fitness and overall health of my body a priority and I am so grateful that @rachparcell shared her story and got this mama motivated!
A post shared by Katherine Heigl (@katherineheigl) on Feb 19, 2018 at 11:21am PST

The Unforgettable actress used Kayla Itsines' Sweat with Kayla app to queue up the Instagram fitness star's Bikini Body Guide workouts (BBG for short). Even though it's done in 28 minutes, this workout is no joke: "I won’t lie, the workouts are real ass kickers but the progress I’ve made in only 5 short weeks has kept me motivated and inspired to keep going!" Heigel said.

But like Blake Lively, Heigl emphasized how important it was for her to take her time to get back into shape as a new mom. "I am so grateful I’ve had a full year to find those ab muscles and get my butt back up where it belongs and wasn’t forced by work to snap back into shape but it is time to make the strength, fitness and overall health of my body a priority," she said.

TBH, Heigl looks amazing in all three of her progress photos. But now that she's joined Kayla's #BBG army, she can definitely knock out burpees, jump squats, and push-ups with the best of them.