Benicio Del Toro is "thrilled" with the birth of his new baby daughter.

The 44-year-old actor became a father for the first time on Sunday (21.08.11) after former girlfriend Kimberly Stewart gave birth to a baby girl and the former couple are ecstatic with their new arrival.

An insider told Us Weekly: "They are thrilled that she is beautiful and healthy."

Although they are not together, Benicio has vowed to play an important part in his little girl's life.

The tot - who has yet to be named - weighed in at 8lbs 10oz - her arrival into the world as delighted her extended family.

Kimberly's parents, rocker Rod Stewart and his first wife Alana Collins, are ecstatic to become grandparents for the first time and are already besotted with her.

The source added: "Both mom and baby are doing really well. Rod and Alana were thrilled to become grandparents for the first time and delighted at the new addition to their family."