Bruce Willis has reportedly become a dad for the fourth time.

The 57-year-old action hero - who already has three daughters from his first marriage to Demi Moore - has just welcomed another baby girl with his second wife Emma Heming, according to Entertainment Tonight.

Mabel Ray Willis was born on April Fool's Day, April 1, weighing in at 9lbs and 1oz, the couple's representative told the website.

Both mother and daughter are healthy and Bruce and Emma - who married in March 2009 - are said to be overjoyed.

Bruce is already father to budding actress Rumer, 23, Scout, 20, and Tallulah Belle, 18.

He split from their mother Demi in 2000 but the couple have remained friends.

Source: Press Release