The man who plays a very special agent had a very special announcement yesterday.

NCIS' Michael Weatherly and his wife, Bojana Jankovic, welcomed their second child together on Tuesday, October 29, the actor announced. It's a boy named Liam!

“Beautiful Bojana gave birth to 10 lb. Liam today, the most important day of the week,” the star Tweeted, amusingly plugging the birth and the latest NCIS Season 11 episode.

And yes, Liam impressively tipped the scales at double digits. Way to go, mom!

Michael, 45, and Bojana, a 32-year-old internist, tied the knot in 2009. They are already parents to daughter Olivia, 18 months, and announced her latest pregnancy in April.

He also has a 17-year-old son, August, from his first marriage to Amelia Heinle.

Congratulations to the actor and the entire happy, growing family!

Steve Marsi is the Managing Editor of TV Fanatic. Follow him on Google+ or email him here.