Katherine Heigl shows off her 14-month post-baby weight loss journey

Bryan Alexander | USA TODAY

Katherine Heigl shares post-baby weight loss images Katherine Heigl is on her way to a well-earned six-pack.

Katherine Heigl is showing off the results of her 14-month effort to take off the weight after giving birth to her son Joshua Bishop in Dec. 2016.

And it's impressive.

Heigl, 39, posted a series of three photos on Instagram showing the progress.

"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," Heigl wrote months before she will embark onto USA Network's Suits, replacing the spot left by Meghan Markle.

The first photo was taken one month after Joshua's birth, the second was a year later.

More: Katherine Heigl, husband Josh Kelley welcome baby boy Joshua Bishop

"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 wrote.

The third, final shot was taken over the past weekend. Heigl says she was inspired by a beach vacation, Suits starting in April "and my deep desire to feel fit, strong and sexy."

The last two-month push finally allowed her "to lose the last of my baby weight and do a deep dive search for the ab muscles I knew were buried under that belly somewhere!" Heigl 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," Heigl wrote. "But it is time to make the strength, fitness and overall health of my body a priority."

Heigl gave props to the Bikini Body Guide and the accompanying app Sweat.

The workouts are tough. "But the progress I’ve made in only 5 short weeks has kept me motivated and inspired to keep going!" Heigl wrote.