Jenna Fischer's Pregnancy Will Play Out on The Office

"Pam and Jim snuck away last season on Valentine's Day, and they had sex," she reveals. "The story is that they conceived this baby at that time and were keeping it a secret until we come back from the summer."

Art is imitating life at The Office.

Jenna Fischer, who announced in May that she's expecting her first child with husband Lee Kirk, is taking her pregnancy to the small screen in her role as Pam Beesly Halpert on the NBC series, reports New York.

So how will the baby bump business unfold for Pam, who's married to Jim Halpert (played by John Krasinski) and already has one child on the series?

"Pam and Jim snuck away last season on Valentine's Day, and they had sex," she reveals.

"The story is that they conceived this baby at that time and were keeping it a secret until we come back from the summer."

The plot twist, however, was in the works before Fischer, 37, found out she had a baby of her own on the way.

"When we started shooting that episode, I thought to myself, 'If everything goes well, this is going to be a very, very convenient coincidence,'" she says. "I think I found out I was pregnant when we were shooting that episode."

And when she's not clocking in at Dunder Mifflin Paper Company, the mommy-to-be is enjoying her pregnancy — and chowing down on sugary cereal.

"[The cravings] change," she tells E! Online at the premiere of A Little Help. "In the beginning, it was a lot of macaroni and cheese and Lucky Charms. Now it's a lot of strawberries."

She adds: "I've been really lucky. I've had a really easy pregnancy."

Well, it's not all easy, she admits.

"Before all the pregnant women at home get mad at me for saying that, I just want them to know that while I did not have morning sickness, I have plenty of cellulite, and it's okay," she laughs. "I've been cursed in other ways."

— Alison Schwartz