By Keith Staskiewicz
Updated March 16, 2010 at 11:57 PM EDT

Comedienne and actress Rachael Harris (The Hangover) will be joining the sitcom My Boys as Marcia, a new neighbor and love interest for character Mike, TBS confirms. Her first episode will be in the latter half of the fourth season, which premieres July 25.

Update: TBS also confirms that cast member Jim Gaffigan will not be returning for Season 4.