Jensen Ackles may hunt demons on Supernatural, but off-screen he has a whole lot of sleepless nights coming his way for another reason, daddy duty! Yep, there's a new member of the Winchester clan. Dean is now the proud papa of a baby girl! The Supernatural star and his wife, Danneel Harris, just welcomed their first child! On Thursday the new mom tweeted, "We are happy to announce the birth of our precious baby girl, Justice Jay "JJ" Ackles. She was born happy and healthy on May 30th."