updated 09/16/2011 AT 5:00 PM ET
•originally published 10/03/2011 AT 1:50 PM ET
Life has imitated art for Jenna Fischer: The actress, whose character on The Office is pregnant, is now a mom herself.
Fischer, 37, and husband Lee Kirk welcomed son Weston Lee on Sept. 24, her rep tells PEOPLE exclusively.
“Mom and baby are doing great,” the rep says.
Fischer, whose character Pam has a daughter and is expecting a son with TV husband Jim Halpert on the show, first revealed she was pregnant in May.