Melissa Joan Hart Shows Off Big Baby Bump in Strapless Orange Dress

Melissa Joan Hart at Operation Shower, where she is the event host sponsored by Carousel Designs at The 2012 Barclays, on Wednesday, Aug. 22, 2012 in Farmingdale, N.Y. Credit: Kathy Kmonicek/Invision for Carousel Designs/AP Images

Melissa Joan Hart is in the home stretch!

Currently expecting her third child with husband Mark Wilkerson, the 36-year-old Melissa & Joey star proudly showed off her pregnancy curves in a strapless orange dress while hosting an event for Operation Shower in Farmingdale, New York August 22. Sponsored by Carousel Designs, Hart tweeted that she couldn't "wait to bump bellies with other pregnant ladies!"

(Operation Shower hosts baby showers for military families in order to ease the stresses of deployment. Buffy the Vampire Slayer actress Sarah Michelle Gellar, who is pregnant with baby No. 2, hosted a similar event in Pacific Palisades, Calif. in February.)

Already mom to sons Mason, 6, and Brady, 4, '90s teen queen Hart isn't as stressed with this pregnancy. "I know what to expect. I'm not freaking out about every little thing," the Clarissa Explains It All actress told Us Weekly in June. "I'm a little more connected to this pregnancy, too. I'm really, really beyond excited to meet this baby."

So are her boys! "I can't leave or go anywhere -- even to bed! -- without them kissing the baby goodnight or saying, 'Good morning, baby,' or reading books to the baby," Hart said.

Hart -- who said she's "due right at the beginning of the fall" -- won't know her child's gender until she gives birth. "This has been a very different pregnancy, so maybe we're having a girl, but we're counting on a boy. We call it 'he' just because it's easier. I don't want to say he, she, it. So, we just say, 'he.'"

Though Hart would be outnumbered four to one if she gives birth to another boy, the ABC Family star isn't worried about being the odd woman out.

"If I was to pinpoint one amazing moment in my life, it would be the moment when my boys met. Mason walked in, jumped on daddy's lap and looked at Brady in my arms on the hospital bed," she told Us. "That was just a special moment, and I'm looking forward to that again."

Hart married Course of Nature guitarist Wilkerson, 35, on July 19, 2003, in Florence, Italy.