Helen Rachel Slater (born December 15, 1963) is an American actress and singer-songwriter. She appeared as the Kryptonian superheroine in TriStar's 1984 film Supergirl. In the following years, she starred in several successful comedy-drama films such as Ruthless People (1986), The Secret of My Success (1987), and City Slickers (1991). She additionally found work as an actress in television, and stage projects, including three guest appearances on the series Smallville (2007–2010). She was a series regular for the two-season run (2011–2013) on the ABC Family series The Lying Game.