Lisa Ann Walter (born August 3, 1963) is an American actress, comedian, and television producer, best known for her roles as Chessy the housekeeper in the romantic comedy film The Parent Trap (1998) and Melissa Schemmenti on the Peabody Award winning ABC mockumentary sitcom Abbott Elementary (2021–present), for which she received a Screen Actors Guild Award for Outstanding Ensemble in a Comedy Series.

She was formerly the creator and executive producer of Oxygen network reality weight-loss competition series, Dance Your Ass Off.

She also created and starred in the 1996–1997 sitcom, Life's Work, and appeared in such films as Bruce Almighty, Shall We Dance, and War of the Worlds.

Later that May, she served as a judge on the ABC reality TV show The Next Best Thing, which searched for the best celebrity impersonators in America.

In early 2008, Walter was in the comedy film Drillbit Taylor, and also starred in the VH1 reality series Celebracadabra, in which celebrities competed to see who was the best magician among them.

[10] Since 2021, Walter's appeared in the ABC comedy Abbott Elementary as second grade teacher Melissa Schemmenti.