(CBS) Kimberly Stewart is a new mom to a baby girl.
The father of the newborn, who was born on Sunday in Los Angeles, Us magazine reports, is actor Benicio del Toro.
Their daughter, whose name was not revealed, weighed 8 lbs., and 9 oz.
The pair are not currently a couple, but del Toro, 41, has said he is supportive of the child.
When news broke in April that Stewart, 31, who worked as an actress and model and is the daughter of rock star Rod Stewart, was, del Toro's rep confirmed to People magazine that he "is the father and is very supportive."
"Although they are not a couple, they are looking forward to the arrival of the baby," the Oscar-winner's rep said at the time.