Jenna Fischer, star of ‘The Office,’ has announced she is having a baby boy! Fischer and husband Lee Kirk first announced her pregnancy in May but withheld the sex of the baby until her appearance on Jay Leno last night. When Leno asked if her parents were happy, Jenna, 37, replied, “This is the second grandchild, but first grandson.”

Leno was shocked to hear ‘grandson’ and Fischer confirmed, “This is the exclusive, Jay”

Fischer also recently announced that her pregnancy would play out in her role as Pam Beesly in ‘The Office.’ Fischer and on screen husband Jim Halpert already have one child together on the show.

“Pam and Jim snuck away last season on Valentine’s Day, and they had sex,” she told New York Magazine.

Congrats Jenna & Lee!