Helen Rachel Slater (born December 15, 1963) is an American actress and singer-songwriter. She is probably best known for playing the total role the 1984 adaptation of Supergirl. She also is well known for her role as Bonnie Rayburn in the 1991 comedy City Slickers.

For Disney, she played Sandy Kessler in the 1986 Touchstone Pictures film, Ruthless People, and Katherine's Mom in Toothless. She also played Kristin Mercer in the ABC Family sitcom The Lying Game.