Katherine Heigl Pregnant With Baby Boy

Katherine Heigl confirmed today that she is pregnant for the first time.

Once news broke, the couple took to social media to express their joy and excitement.

In the blog post, Heigl wrote that the pregnancy "was totally unexpected but thrilling nonetheless.”

The new baby boy will join sisters Naleigh, 7, and Adelaide, 4.

Hahaha!! Well I guess the cats out the bag!!!! We're so excited people!!! What an awesome journey !!! Can't wait to hold this little nugget????Not sure where they found this photo but I was 25 pounds heavier then???? @people #peoplemagazine

A photo posted by Josh Kelley (@joshbkelley) on Jun 23, 2016 at 7:51am PDT

Meanwhile, Heigl posted a picture of a sonogram to her Instagram.

@joshbkelley and I have some news...go to thoseheavenlydays.com and I'll tell you alllllll about it! ??????

A photo posted by Katherine Heigl (@katherineheigl) on Jun 23, 2016 at 9:24am PDT

Heigl also tweeted a photo of herself getting the sonogram, encouraging fans to take a look at her blog, where she plans on sharing her pregnancy experience.

@JoshBkelley and I have some exciting news! Go to https://t.co/SQ2cAcZAan to hear allllll about it! pic.twitter.com/vQ7zdjW4IS

In the blog post, Heigl wrote that the pregnancy "was totally unexpected but thrilling nonetheless.”

The new baby boy will join sisters Naleigh, 7, and Adelaide, 4.

Heigl also tweeted a photo of herself getting the sonogram, encouraging fans to take a look at her blog, where she plans on sharing her pregnancy experience.

@JoshBkelley and I have some exciting news! Go to https://t.co/SQ2cAcZAan to hear allllll about it! pic.twitter.com/vQ7zdjW4IS

In the blog post, Heigl wrote that the pregnancy "was totally unexpected but thrilling nonetheless.”

The new baby boy will join sisters Naleigh, 7, and Adelaide, 4.