David Hornsby and Emily Deschanel
09/22/2011 at 10:00 AM EDT
And baby makes three!
star Emily Deschanel and her husband, It's Always Sunny in Philadelphia
's David Hornsby, welcomed their first child
Wednesday, a baby boy named Henry Hornsby, Deschanel's rep confirms to PEOPLE exclusively.
Deschanel, 34, and Hornsby were married in 2010
. The actress maintained a vegan diet
throughout her pregnancy.
The new mom's Bones
co-star TJ Thyne took to Twitter to share the happy news. "CONGRATULATIONS EMILY D!!!!!!!!!!!!!!" he Tweeted Wednesday
. "Yay yay yay!!! :o)"
But he's surely not the only one celebrating Henry's arrival.
In April, shortly after her sister Emily announced her pregnancy, Zooey Deschanel could hardly contain her excitement
, Tweeting: "I am super excited to be an aunt!"
With reporting by JULIE JORDAN