Annette Charles, who played Cha Cha DiGregorio in the 1978 movie musical, lost her battle with cancer at age 63 on Wednesday, Access Hollywood reports.
As the self-proclaimed "best dancer at St. Bernadette's," Charles's character famously hit the floor with John Travolta during the dance competition scene.
Charles, who also appeared on TV's The Bionic Woman, The Incredible Hulk and Magnum, P.I., later became a speech professor at California State University Northridge.
In May, Grease fans mourned the loss of Jeff Conaway, who died at 60 of various health complications stemming from a longtime battle with cocaine, painkillers and alcohol. Conaway played Kenickie in the film.