Helen Rachel Slater (born December 15, 1963) is an American actress and singer-songwriter.
She appeared in the title role in the 1984 film Supergirl. In the following years she starred in several successful comedy-drama films such as Ruthless People, The Secret of My Success, and City Slickers. Since then she has found work as an actress in film, television, and stage projects, including guest appearances on the series Smallville. As of 2011, she currently co-stars as Kristin Mercer on ABC Family series The Lying Game.
In the 2000s, she recorded three albums, singing her own compositions and playing the piano.
Helen Slater was born in Bethpage, New York, the daughter of Alice Joan (née Citrin), a lawyer and nuclear disarmament peace activist based in New York City, and Gerald Slater, a television executive; the two divorced in 1974. She has a brother, David, who is a lawyer in New York City. Her family is Jewish. Slater attended Great Neck South High School and then transferred to the High School of Performing Arts from which she was graduated in 1982. She is not related to actor Christian Slater.
She married editor Robert Watzke in September 1989. Their daughter, Hannah Nika, was born August 28, 1995.