It's A Boy For 'Office' Star Jenna Fischer!

A pregnant Jenna Fischer arrives at the premiere "A Little Help" at Sony Pictures Studios in Culver City, Calif. on July 14, 2011 A pregnant Jenna Fischer arrives at the premiere

It’s double diaper duty for “The Office” star Jenna Fischer!

Jenna, who plays new mom Pam on the NBC sitcom, has welcomed her first child, a rep for the actress confirmed to Access Hollywood.

Jenna and husband Lee Kirk are proud parents to son Weston Lee, who was born on September 24.

“Mom and baby are doing great,” the rep noted.

“The Office” writers incorporated Jenna’s real-life pregnancy into the show this season, as Pam is currently pregnant with her second child with Dunder Mifflin husband Jim (John Krasinski).

Jenna first announced her pregnancy back in May and in July, she confirmed the couple was expecting a boy during a visit to “The Tonight Show.”

It appears her role on “The Office” ignited a bit of baby fever for Jenna, who said working with a pair of twin babies, who play her & Jim’s daughter Cece on the show, warmed her heart.

“They got the cutest [babies] in town to play our baby,” Jenna told The LA Times’ Brand X blog in September 2010. “Pretty much any time we get to see baby Cece is great.”

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