Jenna Fischer pregnant with second child!

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Another little bundle of joy is on the way for Jenna Fischer! The former Office star, 39, is pregnant and expecting her second child with husband Lee Kirk this summer, her rep exclusively confirms to Us Weekly.

Fischer and Kirk are already parents to son Weston Lee, whom they welcomed on Sept. 24, 2011. The couple married in July 2010 in Malibu, Calif., in a ceremony officiated by Survivor host Jeff Probst.

Speaking about their little boy with Us back in 2012, screenwriter Kirk said he was "having a lot of fun" raising Weston. "He's laughing a lot," Kirk told Us. "I feel like making your son laugh is the greatest feeling in the world."

"I love being a family," Fischer added in a separate interview. "I love going from two people to three people, and it has deepened the bond between me and my husband. We love being together, the three of us. Our little unit."