(Watch part one of Fischer’s interview here.)

Lee Kirk and Jenna Fischer. (Valerie Macon/GETTY IMAGES)

Jenna Fischer revealed that her first child with hubby Lee Kirk will be a boy on Tuesday’s “Tonight Show.”

“The Office” actress told Jay Leno her son is due in late September. Fischer, who was on the show promoting her new movie, “A Little Help,” also disclosed that pregnancy has made her really hungry and regularly in need of a bathroom. Shocking!

Last week, Fischer told New York Magazine’s Vulture blog that her pregnancy would be written into the show. Does this mean the Halperts will have a son as well? Does that question make you want to watch “The Office?” If so, you’re welcome NBC.

More celebrity baby news from Celebritology:

Maya Rudolph welcomes baby boy

Victoria Beckham and David Beckham welcome baby girl

Matthew Bellamy and Kate Hudson name son Bingham

Jewel and Ty Murray welcome baby boy

Watch the full interview below.