Born in Honolulu, Hawaii, Ewing guest-starred on many other television series, including The Mod Squad (1968), Love American Style (1969), Mission: Impossible (1969), The Big Valley (1969), The F.B.I. (1970), Archer (1975), Washington: Behind Closed Doors (1977), Harry O (1974), and The Rockford Files (1977). One of her earliest television roles was in he original Star Trek in the third-season episode "The Cloud Minders" (1969) as Droxine.
Ewing made her feature film debut in the supporting role of Tracy Rutledge, in the movie 80 Steps to Jonah (1969), and also appeared in Play It As It Lays (1972) and The Way We Were (1973). Her last appearance on the big screen was as Jenny in the western thriller Knife for the Ladies (1974). Her last television appearance was in Washington: Behind Closed Doors (1977).
