Warren made her Broadway debut in 1972 in 6 Rms Riv Vu, for which she won a Theatre World Award. She appeared in the short-lived P.S. Your Cat Is Dead!. Warren's film credits include Sam's Song (1969), Night Moves (1975), Slap Shot (1977, as the frustrated wife of hockey coach Paul Newman), Another Man, Another Chance (1977), Ice Castles (1978), Mutant (1984), and Fatal Beauty (1987). She was listed as one of the 12 "Promising New Actors of 1975" in John Willis' Screen World, Volume 27. She also played a role in Steel Cowboy (1978). Her television credits include guest roles on The Bob Newhart Show, Kojak, Cagney & Lacey, Hotel, Hooperman, Murder, She Wrote, and others. She had a featured role as Dinah Caswell, a former model and mother of an aspiring model in the 1982 TV movie Paper Dolls, and the 1984 television series based on the movie.