Jenna Fischer welcomes a son

Jenna Fischer, whose character on "The Office" is pregnant, is now a mom herself.

STORY HIGHLIGHTS

• Jenna Fischer, 37, and husband Lee Kirk welcomed a son


• Fischer's character Pam is expecting a son


• "I've had a really easy pregnancy," Fischer said

() -- 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, in May.

In July, she told Jay Leno on "The Tonight Show" .

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 , 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.

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