Jenna Fischer's 'Crazy Nesting Phase' of Her Pregnancy Has Kicked In!

Jenna Fischer displays her large baby bump while filling up her car’s gas tank on Tuesday (March 18) in Glendale, Calif.

The 40-year-old pregnant The Office actress has been busy prepping for her new baby’s arrival.

“Gearing up to decorate the nursery. Very excited for my rug swatches from @SerenaandLily to arrive! I’m a nerd for swatches!” Jenna tweeted earlier in the week. “So I’m pretty sure the crazy nesting phase of my pregnancy has kicked in. Yesterday, I dusted the pipes in my basement.”

10+ pictures inside of Jenna Fischer at the gas station…