According to People magazine, Katherine Heigl and husband Josh Kelley welcomed Joshua Bishop Kelley Jr. into the world on December 20.

The couple, who also share two adopted daughters, managed to keep the actual birth under wraps despite announcing her pregnancy back in June.

She had previously expressed her excitement to expand her family, stating: “The Kelley clan is thrilled to announce that we are expecting a third addition to our family.

Naleigh and Adalaide could not be more excited to welcome their new sibling into the fold, and Josh and I are overflowing with joy and gratitude. This is an incredibly exciting time for us filled with hope, anticipation and hormones.

Well, only I’m filled with hormones, but everyone in the family gets to enjoy them. We couldn’t be more excited to be able to finally share this news with our fans, and are looking forward to continuing to share the journey with you all.”

And the actress says the only way for her to stay in shape was through yoga.

“It’s hard enough for me to get motivated to workout when I’m not pregnant but now that I am it’s 10 times harder. I’m not up for weight training, cardio workouts or any of those new and fashionable exercise classes. What I am up for is yoga!”

Despite her enthusiasm, Katherine was cautious as her doctor had warned her about the dangers of conceiving at a mature age.

She shared: “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!”