Hugh Grant is a baby daddy!

English Actor Hugh Grant, 51, become a first time day in early October when he welcomed a baby girl US Weekly Reports.

"I can confirm that Hugh Grant is the delighted father of a baby girl," a rep for the About a Boy actor said in a statement. "He and the mother had a fleeting affair and while this was not planned, Hugh could not be happier or more supportive. He and the mother have discussed everything and are on very friendly terms."

"He's going to be a great dad!" the source tells Us. "He's beaming about his daughter. He's not with the mum anymore but he's absolutely thrilled."