Melissa Joan Hart is pregnant with baby No. 3

Melissa Joan Hart is pregnant for the third time, which means she may be holding a basketball, or perhaps a watermelon, and standing behind tall chairs on upcoming episodes of “Melissa & Joey.”

Joey Lawrence, in fact, may be forced to remove his shirt more often to draw eyes away from his costar’s expanding waistline.

Their sitcom is returning May 30 for a second season on ABC Family. One promo for the two-episode premiere shows Lawrence minus his shirt, pecs bulging and glistening. (Maybe he borrowed some baby oil from Hart?) In the other promo, Hart is holding a purse in front of her midsection.

Hart, who is marking her 36th birthday Wednesday, announced the upcoming event Tuesday afternoon on Twitter: “(Early) Happy Birthday to me! And baby makes 3!” A photo of Hart, her two boys and her husband (shirt on) makes the announcement extremely cute.

Hubby would be Mark Wilkerson, lead singer of Course of Nature. Their son Mason Walter is 6 years old, and son Braydon Hart turned 4 last month.

Hart started in showbiz when she was Braydon’s age, according to IMDb, in a bathtub-toy commercial. As a teen she starred in the hit Nickelodeon series “Clarissa Explains It All” and then in 1994 moved to “Sabrina: The Teenage Witch,” which lasted until 2003. A 2009 spin on”Dancing With the Stars” preceded “Melissa & Joey.”

But this is the first time Hart will be pregnant while starring in a TV show. Should be fun. Cue the basketball.

ALSO:

Anna Paquin, Stephen Moyer expecting a baby

Miley Cyrus heads to the ER to fix a blender-bloodied hand

Tony Romo and Candice Crawford -- sister of Chace -- welcome a baby boy