Katherine Heigl has some “unexpected” but “thrilling” news: She’s pregnant for the first time!

Heigl, who’s already a mom to two daughters who joined the family via adoption, made the big announcement on Instagram with this sonogram pic.

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On her blog, Heavenly Days, the 37 year old actress went into all the deets – including how she and her husband, musician Josh Kelly, were planning to add to their family, but didn’t expect it would be this way:

“We’ve known for awhile that we wanted to add to our family and frankly didn’t really care how we chose to do that. 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!”

Congrats everybody!