updated 12/02/2010 AT 5:00 PM ET
•originally published 12/22/2010 AT 11:45 AM ET
It’s a bouncing baby boy.
Ali Larter and her writer-actor husband Hayes MacArthur welcomed their first child earlier this week, her rep confirms to PEOPLE.
Their son, reportedly named Theodore Hayes, arrived early Monday morning, Dec. 20.
Larter, 34, let slip she was having a boy midway through her pregnancy.