Katherine Heigl is on her way to a well-earned six-pack.

The mother of three, 39, shared three photos of herself on Instagram Monday to show off her weight loss progress nearly 14 months after giving birth to her third child, 13-month-old son Joshua Bishop.

Heigl shared a candid post about her weight, writing about her journey to lose the baby weight.

“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,” the actress wrote. “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!”

Heigl said she had a vacation at the beach to look forward to, as well as a job on Suits — both being motivators for the actress to get back into shape as well as “my deep desire to feel fit, strong and sexy.”

The former Grey’s Anatomy star said she was looking forward to doing “a deep dive search for the ab muscles” that are currently “buried under that belly somewhere!”

RELATED VIDEO: Katherine Heigl Opens Up About Losing Her Baby Weight: ‘ Respect My Body’s Needs’

Heigl shared a few tips with her followers as to apps and challenges that helped her on her journey, including the Bikini Body Guide challenge by A8ustralian trainer Kayla Itsine and the Sweat app.

“I won’t lie, the workouts are real a— kickers but the progress I’ve made in only 5 short weeks has kept me motivated and inspired to keep going!” she wrote. “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 and I am so grateful that @rachparcell shared her story and got this mama motivated!”

Heigl isn’t the only actress sharing their health journeys after having a baby. Blake Lively opened up about losing 61 lbs. after 14 months of training.

The mother of two shared an Instagram post, writing, ““Turns out you can’t lose the 61 lbs. you gained during pregnancy by just scrolling through Instagram and wondering why you don’t look like all the bikini models. Thanks @donsaladino for kickin my A double S into shape. 10 months to gain, 14 months to lose. Feeling very proud.”