Other television credits include spending one season as a cast member on Saturday Night Live from 1980 to 1981 and co-starring on the Fox sitcom Women in Prison.
[3] Dillon has performed on the Broadway stage, appearing as Agnes in the 1974 revival of Gypsy starring Angela Lansbury;[4] in the 1975 revival of Thornton Wilder's The Skin of Our Teeth; in the 1980 stage version of Harold and Maude;[5] and as Mickey in the 1983 Gershwin musical My One and Only, starring Tommy Tune and Twiggy, for which she received a nomination for a Tony Award for Featured Actress in a Musical.
[7] Dillon made her big screen debut in Saturday Night Fever, playing Doreen, who asks John Travolta's character Tony if she can wipe his forehead.
[10] In regional theatre, Dillon appeared in the new musical Triumph of Love at Center Stage, Baltimore, Maryland, in December 1996, as one of a "comic trio of clowns".
[14] Dillon starred as Beatrice in the world premiere of Tom Dudzick's Don't Talk to the Actors at Studio Arena Theatre in Buffalo, New York in September 2007.