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Emily Deschanel, David Hornsby

Jason LaVeris/FilmMagic

Congratulations are in order for Emily Deschanel!

The Bones star's rep tells E! News exclusively that she and her It's Always Sunny in Philadelphia hubby David Hornsby are expecting their second child together. Their new little bundle of joy will join the couple's son, Henry Hornsby, who was born in September 2011.

The duo's exciting news also comes during a very special time for the TV actress, who will be celebrating the hit Fox series' milestone 200th episode, airing on Dec. 11.

To congratulate Emily, co-star David Boreanaz and the rest of the cast on its amazing run, some of Fox's biggest stars got together and made the most adorable video ever.

Of course, Emily's sister and New Girl's leading lady Zooey Deschanel, who has guest-starred on Bones as Brennan's (Deschanel) cousin, made sure to get in on the fun as well and gave her well wishes in her usual quirky charm.

Don't worry, when it comes to juggling parenthood with work, Emily seems to have a good system in place.

"I have a great nanny who is there with me all day, every day. [Henry] will come to set and hang out just off camera," she once told Mom.Me.

"I can't say he's been silent the whole time, but I have a wonderful situation where I get to see my baby throughout the day, and I can't imagine leaving him home at this point. But I know so many friends who have regular jobs and can't take their baby to work, so I feel incredibly, incredibly lucky."

Don't forget to catch the 200th episode of Bones on Fox on Dec. 11!