Filmography83 titles
| Year | Title | Character | Age at release |
|---|---|---|---|
| 2023 | The Exorcist: BelieverMovie | Regan MacNeil | 64 |
| 2023 | 100 Years of Warner Bros.Series | Self | 64 |
| 2020 | Skin: A History of Nudity in the MoviesMovie | Self | 61 |
| 2020 | The AGFA Mystery Mixtape VaultMovie | (archive footage) | 61 |
| 2020 | AGFA Mystery Mixtape #1Movie | Self | 61 |
| 2019 | The Masked SingerSeries | Scarecrow (archive footage) | 60 |
| 2018 | Eli Roth's History of HorrorSeries | Self | 59 |
| 2018 | Surge of Power: Revenge of the SequelMovie | Helen Harris | 59 |
| 2015 | Satan LivesMovie | Self | 56 |
| 2013 | Blood of 1000 VirginsMovie | Self (archive footage) | 54 |
| 2011 | Celebrity Nude Revue: Easy 80's Volume 1Movie | Self (archive footage) | 52 |
| 2010 | Raising Hell: Filming the ExorcistMovie | Self | 51 |
| 2010 | The Exorcist Locations: Georgetown Then and NowMovie | Self | 51 |
| 2009 | Celebrity Ghost StoriesSeries | Self | 50 |
| 2009 | RuPaul's Drag RaceSeries | Self - Guest Judge | 50 |
| 2006 | I Love the '70s: Volume 2Series | Self | 47 |
| 2006 | Child Star ConfidentialSeries | Self | 47 |
| 2006 | Teddy ScaresMovie | Rita Mortis (voice) | 47 |
| 2005 | SupernaturalSeries | Diana Ballard | 46 |
| 2005 | 100 Greatest Kid StarsSeries | — | 46 |
| 2005 | The Perfect Scary MovieMovie | Self | 46 |
| 2004 | UnConventionalMovie | Self | 45 |
| 2001 | Good Day LiveSeries | Self | 42 |
| 2000 | S Club 7: Artistic DifferencesMovie | Joni | 41 |
| 2000 | Scariest Places on EarthSeries | — | 41 |
| 1999 | S Club 7Series | Joni Witherspoon | 40 |
| 1999 | The Blair Bitch ProjectMovie | Heather | 40 |
| 1998 | The Fear of God: 25 Years of The ExorcistMovie | Self - Regan | 39 |
| 1998 | Hollywood SquaresSeries | Self - Panelist | 39 |
| 1998 | Godzilla: The SeriesSeries | Alexandra Springer (voice) | 39 |
| 1998 | Mythos Hollywood - Das Geheimnis des ErfolgsMovie | Self | 39 |
| 1997 | Extreme GhostbustersSeries | Selene (voice) | 38 |
| 1997 | Behind the MusicSeries | Self | 38 |
| 1996 | Psi Factor: Chronicles of the ParanormalSeries | Rebecca Royce | 37 |
| 1996 | ScreamMovie | Obnoxious Reporter (uncredited) | 37 |
| 1996 | Prey of the JaguarMovie | Cody Johnson | 37 |
| 1996 | E! True Hollywood StorySeries | — | 37 |
| 1994 | Double BlastMovie | Claudia | 35 |
| 1994 | Gang BoysMovie | Maggie Joiner | 35 |
| 1993 | Intimate PortraitSeries | Self | 34 |
| 1992 | RenegadeSeries | Teddy Ray Thompson | 33 |
| 1992 | Calendar Girl, Cop, Killer? The Bambi Bembenek StoryMovie | Jane Mader | 33 |
| 1992 | Perry Mason: The Case of the Heartbroken BrideMovie | Hannah Hawkes | 33 |
| 1991 | Fatal BondMovie | Leonie Stevens | 32 |
| 1990 | Nickelodeon Studios Opening Day Celebration!Movie | — | 31 |
| 1990 | RepossessedMovie | Nancy Aglet | 31 |
| 1989 | Bail OutMovie | Annette 'Nettie' Ridgeway | 30 |
| 1989 | Up Your AlleyMovie | Vickie Adderly | 30 |
| 1989 | Hollywood on HorsesMovie | Self | 30 |
| 1989 | The ChillingMovie | Mary Hampton | 30 |
| 1989 | Bedroom Eyes IIMovie | Sophie Stevens | 30 |
| 1988 | GrotesqueMovie | Lisa | 29 |
| 1988 | MonstersSeries | Lia | 29 |
| 1988 | Silent AssassinsMovie | Sara | 29 |
| 1988 | Moving TargetMovie | Sally Tyler | 29 |
| 1988 | Witchcraft (Evil Encounters)Movie | Jane Brooks | 29 |
| 1988 | SFX RetaliatorMovie | Doris | 29 |
| 1987 | Married... with ChildrenSeries | Ida Mae | 28 |
| 1987 | NightforceMovie | Carla | 28 |
| 1985 | MacGyverSeries | Jenny Larson | 26 |
| 1985 | Red HeatMovie | Christine Carlson | 26 |
| 1985 | Savage IslandMovie | Daly | 26 |
| 1984 | Murder, She WroteSeries | Jane Pascal | 25 |
| 1984 | Night PatrolMovie | Officer Sue Perman | 25 |
| 1984 | Savage StreetsMovie | Brenda | 25 |
| 1983 | Chained HeatMovie | Carol Henderson | 24 |
| 1983 | Imps*Movie | Jamie | 24 |
| 1981 | RuckusMovie | Jenny Bellows | 22 |
| 1981 | Hell NightMovie | Marti Gaines | 22 |
| 1979 | Stranger in Our HouseMovie | Rachel Bryant | 20 |
| 1979 | Roller BoogieMovie | Terry Barkley | 20 |
| 1979 | Wild Horse HankMovie | Hank Bradford | 20 |
| 1977 | The Love BoatSeries | Muffy | 18 |
| 1977 | Exorcist II: The HereticMovie | Regan MacNeil | 18 |
| 1977 | US Against the WorldMovie | Self | 18 |
| 1976 | Victory at EntebbeMovie | Chana Vilnofsky | 17 |
| 1976 | Born InnocentMovie | Chris Parker | 17 |
| 1974 | Airport 1975Movie | Janice Abbott | 15 |
| 1973 | The ExorcistMovie | Regan MacNeil | 14 |
| 1971 | The Sporting ClubMovie | Barby | 12 |
| 1970 | The Way We Live NowMovie | Sara Aldridge | 11 |
| 1968 | Hidden FacesSeries | Allyn Jaffe | 9 |
| 1962 | The Merv Griffin ShowSeries | Self | 3 |