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.