Actor Benicio Del Toro and socialite Kimberly Stewart are celebrating after she gave birth to a baby girl. The unnamed baby was 22 inches long and weighed 8 lbs 9 oz.

PHOTOS: A Pregnant Kimberly Stewart Grabs Coffee With Dad Rod

Stewart, daughter of iconic rocker Rod Stewart, gave birth on Sunday (August 21) at a Los Angeles hospital. According to Us Weekly, the rock star and his wife, Penny Lancaster, were at his daughter’s side as she delivered his grandchild.

The baby was conceived during a short fling between Stewart and Oscar winner Del Toro, but they are no longer an item.