Actor Jensen Ackles is celebrating after becoming a first-time father.

The Supernatural star's wife Danneel gave birth to a little girl, Justice Jay Ackles, on Thursday (30May13).

The new mum took to her page to share the happy news, writing, "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."

Justice is the first baby for the Ackles and his partner, who married in his native Texas in 2010, while Ackles' Supernatural co-star Jared Padalecki became a first-time father last year (Mar12).