Pregnant Katherine Heigl Cradles Her Growing Baby Bump on the Set of 'Doubt' -- See the Cute Pics!

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Katherine Heigl already has that pregnancy glow.

The 37-year-old actress was snapped on the set of her new show, Doubt, on Tuesday in Los Angeles, looking gorgeous in a blue blouse and a knee-length black skirt. Keeping her blonde hair down in soft waves, Heigl sweetly touched her baby bump as she filmed scenes for the courtroom drama.

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And she was also able to give her feet a much-needed break from heels! Though she wore black pumps for the scene, Heigl changed into a comfy pair of brown slip-ons in between takes.

Heigl is currently pregnant with her and husband Josh Kelley's third child, after previously adopting their two daughters, 7-year-old Naleigh Moon and 4-year-old daughter Adelaide. The couple is expecting a baby boy, due in January.

"We've known for a while that we wanted to add to our family and frankly didn’t really care how we chose to do that," the former Grey's Anatomy star revealed in a blog post last month. "We were considering adoption again, fostering, or pregnancy if possible. Seeing as I have never been pregnant and as my OB/GYN reminded me last year, I'm of advanced maternal age, I wasn't sure pregnancy was even in the cards for us. Turns out it was very much in the cards!"

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Watch the video below to see the family's adorable Fourth of July celebration, which included Heigl and Naleigh adorably lounging in their swimsuits.