Welcome to the Late-in-Life Mom Club, J. Lo!

Celebrity Jennifer Lopez, 38, gave birth to twins --a girl and a boy-- at 12:45 AM Friday. Her daughter weighed 5 pounds, 7 ounces and her son weighed 6 pounds, according to sources.

J.Lo joins the ranks of other well-known mommies-come-lately like CNN anchor Nancy Grace, actresses Julia Roberts and Brooke Shields, and singer Sheryl Crowe.