Maureen Ann "Mo" Collins is an American actress and comedian. She is perhaps best known for being a member of the ensemble on FOX's sketch comedy series MADtv. Collins became well known for several characters during her tenure on the show. She was a cast member from the 4th season (1998) through the 9th season (2004); she only appeared in fourteen episodes during season 9 due to contractual reasons. She returned to MADtv in the 10th season for one episode, and again when she made an appearance on the 300th Episode doing her popular character Lorraine Swanson.

She played the character of Denise in "En Garde".