Mariclare Costello Filmography
- Actor (33 credits)
- Shadow of the Blair Witch (2000) Kathy Patterson
- High Tide (1994)
- Indecent Proposal (1993) David's Mother
- She Said No (1990) Susan Finn
- Appearances (1990) Rose
- American Harvest (1987) Mary Alice Duncan
- Double Switch (1987)
- Heart of a Champion: The Ray Mancini Story (1985) Ellen Mancini
- The Adventures of Buckaroo Banzai Across the 8th Dimension (1984) Senator Cunningham
- Victims for Victims: The Theresa Saldana Story (1984) Jane Bladow
- Nightmares (1983) Adele Cooney (segment 'The Bishop of Battle')
- Skeezer (1982) Barbara Thompson
- Coward of the County (1981) Emma
- Ordinary People (1980) Audrey
- The Boy Who Drank Too Much (1980) Mrs. Carpenter
- A Sensitive, Passionate Man (1977) Pat Morris
- Visions (1976)
- Raid on Entebbe (1976) Gabrielle Krieger
- Sara (1976) Julia Bailey
- Sunshine (1975) Social Worker
- Conspiracy of Terror (1975) Mrs. Warnall
- NBC Special Treat (1975) Kay Armstrong
- The Gun (1974) Beryl Strauss
- After the Fall (1974) Louise
- The Execution of Private Slovik (1974) Antoinette Slovik
- Amy Prentiss (1974) Enid Feeny
- Harry O (1973) Emily
- The Waltons (1971) Miss Rosemary Hunter
- Let's Scare Jessica to Death (1971)
- Pound (1970) Honky Killer's Wife
- Storefront Lawyers (1970) Nancy Collins
- N.Y.P.D. (1967)
- The Tiger Makes Out (1967) Rosi
