It's a girl for Jensen Ackles and Danneel Harris!!

The "Supernatural" star, 35, and the "One Tree Hill" alum, 34, welcomed their first child. "We are happy to announce the birth of our precious baby girl, JusticeJay 'JJ' Ackles," Harris tweeted June 6. "She was born happy and healthy on May 30."

Harris announced her pregnancy in January just before the People's Choice Awards. The new parents met as costars in the 2007 movie "Ten Inch Hero." Ackles proposed in 2009 and the pair tied the knot the following year in the actor's hometown of Dallas, Tex.

"Supernatural" will return for a ninth season Tuesdays this fall on The CW.