Jenna Fischer Welcomes a Son
10/03/2011 AT 01:50 PM EDT
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.
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