By peoplestaff225
Updated November 26, 2008 02:00 PM

It’s a boy for Criminal Minds star A.J. Cook! The 30-year-old actress and her husband Nathan Andersen welcomed son Mekhai Allan Andersen on Saturday, September 13th. Weighing in at 7 lbs, 10 oz and 20 inches long, Mekhai was born at 8:50 p.m. A.J., who formerly appeared on Tru Calling, tells CBB exclusively,

A.J. and Nathan, who announced the pregnancy in March, have been married for seven years. Criminal Minds airs Wednesday nights at 9 p.m. on CBS.