Jenna Fischer and Lee Kirk
10/03/2011 AT 01:50 PM EDT
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 July, she told Jay Leno on The Tonight Show
she was having a boy
During her pregnancy, she shared her cravings
and admitted she was virtually sailing through the nine months.
"In the beginning, it was a lot of macaroni and cheese and Lucky Charms. Now it's a lot of strawberries," she said. "I've been really lucky. I’ve had a really easy pregnancy."
The actress has spoken in the past of her excitement about having children
, saying that after becoming an aunt, "I already wanted kids, but even more so now."
Fischer and Kirk were engaged in 2009 while both were vacationing in Europe and got married
in July 2010, with Survivor
's Jeff Probst officiating the ceremony.
Reporting by JULIE JORDAN