grant031511_03_X17230WM.jpgHugh Grant is a first time dad at the age of 51! He's the father of a baby girl.

Although the baby's mom has not been identified, the actor has been linked to Chinese actress Tinglan Hong.

A source tells Us:

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

Grant dated actress Elizabeth Hurley for 13 years, but the two split back in 2000.