Kimberly Stewart gave birth to her first child on Sunday.
Benicio del Toro was on hand for his baby girl's arrival, while Kimberly's mom, Alana Stewart, and her father, rock legend Rod Stewart, were also at the hospital for the birth.
A rep for Benicio del Toro confirmed in April that the actor was the father of Kimberly's baby, emphasizing that "Although [he and Kimberly] are not a couple, they are looking forward to the arrival of the baby."
Benicio, 44, won an Academy Award for his role in Traffic in 2001. Kimberly, 32, was engaged to Laguna Beach star Talan Torriero back in 2005 but the two called off their engagement two weeks later.