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Aqua mom! Pregnant Jenna Fischer proudly showed off her bare baby bump while celebrating her 40th birthday at the beach on Friday.

PHOTOS: Celebrity pregnancies

"Thanks for all the sweet birthday messages," Fischer tweeted. "I think I found a good place to celebrate!"

Indeed, the Office alum embraced the sun as she posed near the beach with her hands on her hips. The actress wore tight-fitting white pants and flaunted her growing belly in a blue bikini top.

PHOTOS: Celebrity pregnancy confessions

Us exclusively revealed on Feb. 25 that the actress and her husband Lee Kirk are expecting their second child. The couple married in 2010 in Malibu, Calif., and are already parents to son Weston, 2.

Fischer debuted her baby bump on Feb. 27 in L.A., and is clearly giving in to her pregnancy cravings already. "I ordered a salad and donut for lunch," she quipped on Feb. 20. She also rested up while watching the 86th Academy Awards over the weekend.

PHOTOS: Celeb mom must-haves

"I was going to go to the Oscars but I'm going to Target to buy bath towels instead," she joked on March 2. "Pretty much the same thing. I have an undo."


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