Pregnant Alyssa Milano showed off her growing baby bump in a selfie posted via Instagram on Friday, April 4 -- see the picture Credit: Courtesy of Alyssa Milano

Baby's the boss! Pregnant Alyssa Milano showed off her growing baby bump in a selfie posted via Instagram on Friday, April 4.

"The bump," Milano, 41, wrote. "#shortpeoplecarrybig #noitsnottwins." In the snapshot, the Who's the Boss? alum smiles as she cradles her belly. She looks flawless in a tight-fitting navy blue maxi dress and wears her brunette locks down.

Us exclusively broke news last month that the Mistresses actress and her CAA agent husband David Bugliari, 33, are expecting their second child together. The couple -- married since 2009 -- are already parents to son Milo, 2.

"Alyssa is so excited to be pregnant again!" a source told Us at the time. "She just recently started showing and has wanted to expand her family with David for a while."