Filmography73 titles
| Year | Title | Character | Age at release |
|---|---|---|---|
| 2026 | BallisticMovie | Nance Redfield | 53 |
| 2025 | The AbandonsSeries | Fiona Nolan | 52 |
| 2025 | World of Westeros Ambient VideoMovie | Cersei Lannister | 52 |
| 2023 | Beacon 23Series | Aster Calyx | 50 |
| 2023 | SmartLess: On the RoadSeries | — | 50 |
| 2022 | DC League of Super-PetsMovie | Lara (voice) | 49 |
| 2021 | Gunpowder MilkshakeMovie | Scarlet | 48 |
| 2020 | Wizards: Tales of ArcadiaSeries | Morgana (voice) | 47 |
| 2019 | The Dark Crystal: Age of ResistanceSeries | Maudra Fara (voice) | 46 |
| 2019 | Fighting with My FamilyMovie | Julia 'Sweet Saraya' Knight | 46 |
| 2019 | Infinity TrainSeries | Amelia / Teacher (voice) | 46 |
| 2018 | Walk Like a PantherMovie | Miss Winters | 45 |
| 2018 | Leading Lady PartsMovie | Actress #6 | 45 |
| 2018 | Rise of the Teenage Mutant Ninja TurtlesSeries | Big Mama (voice) | 45 |
| 2017 | ThumperMovie | Ellen | 44 |
| 2016 | Trollhunters: Tales of ArcadiaSeries | Morgana / The Pale Lady (voice) | 43 |
| 2016 | Kingsglaive: Final Fantasy XVMovie | Lunafreya Nox Fleuret (voice) | 43 |
| 2015 | Game of Thrones The IMAX ExperienceMovie | Cersei Lannister | 42 |
| 2015 | UnityMovie | Narrator (voice) | 42 |
| 2015 | ZipperMovie | Jeannie Ellis | 42 |
| 2015 | Game of Thrones: A Day in the LifeMovie | Self | 42 |
| 2015 | Danger MouseSeries | Jeopardy Mouse (voice) | 42 |
| 2014 | 300: Rise of an EmpireMovie | Queen Gorgo | 41 |
| 2014 | Late Night with Seth MeyersSeries | Self | 41 |
| 2014 | Running Wild with Bear GryllsSeries | Self | 41 |
| 2013 | The Adventurer: The Curse of the Midas BoxMovie | Monica | 40 |
| 2012 | DreddMovie | Ma-Ma | 39 |
| 2011 | Game of ThronesSeries | Cersei Lannister | 38 |
| 2010 | Pete Smalls Is DeadMovie | Shannah | 37 |
| 2009 | White CollarSeries | Sally | 36 |
| 2009 | RuPaul's Drag RaceSeries | Self - Special Guest | 36 |
| 2009 | Tell-TaleMovie | Elizabeth | 36 |
| 2009 | Laid to RestMovie | Cindy | 36 |
| 2008 | Terminator: The Sarah Connor ChroniclesSeries | Sarah Connor | 35 |
| 2008 | The BrokenMovie | Gina McVey | 35 |
| 2008 | The Red BaronMovie | Käthe | 35 |
| 2008 | WhoreMovie | Mom | 35 |
| 2007 | 300Movie | Gorgo | 34 |
| 2007 | St Trinian'sMovie | Miss Dickinson | 34 |
| 2007 | The ContractorMovie | DI Annette Ballard | 34 |
| 2006 | UltraMovie | Penny / Ultra | 33 |
| 2005 | The Brothers GrimmMovie | Angelika | 32 |
| 2005 | The CaveMovie | Dr. Kathryn Jennings | 32 |
| 2005 | The Late Late Show with Craig FergusonSeries | Self | 32 |
| 2004 | The Long FirmSeries | Ruby Ryder | 31 |
| 2003 | Jimmy Kimmel Live!Series | Self | 30 |
| 2003 | The ActorsMovie | Dolores | 30 |
| 2002 | The Gathering StormMovie | Ava Wigram | 29 |
| 2002 | Black PlagueMovie | Lady Matilda Mellerby | 29 |
| 2002 | Ripley's GameMovie | Sarah Trevanny | 29 |
| 2000 | GossipMovie | Cathy Jones | 27 |
| 1998 | The Man with Rain in His ShoesMovie | Sylvia Weld | 25 |
| 1998 | MerlinSeries | Guinevere | 25 |
| 1997 | The HungerSeries | Steph Reynolds | 24 |
| 1997 | FaceMovie | Connie | 24 |
| 1997 | Mrs. DallowayMovie | Young Sally | 24 |
| 1996 | BallykissangelSeries | Jenny Clark | 23 |
| 1995 | Kavanagh Q.C.Series | Natasha Jackson | 22 |
| 1995 | Band of GoldSeries | Colette | 22 |
| 1995 | The GrotesqueMovie | Cleo Coal | 22 |
| 1994 | The Jungle BookMovie | Katherine 'Kitty' Brydon | 21 |
| 1994 | MacGyver: Trail to DoomsdayMovie | Elise Moran | 21 |
| 1993 | The Remains of the DayMovie | Lizzie | 20 |
| 1993 | The Clothes in the WardrobeMovie | Margaret | 20 |
| 1993 | CenturyMovie | Miriam | 20 |
| 1992 | WaterlandMovie | Young Mary | 19 |
| 1991 | SpenderSeries | Emily Goodman | 18 |
| 1991 | Soldier SoldierSeries | Shenna Bowles | 18 |
| 1988 | Shark WeekSeries | Narrator | 15 |
| 1968 | How We Used To LiveSeries | Grace Palmer | — |
| 0 | RitaMovie | Rita | — |
| 0 | Project CodenameSeries | — | — |
| 0 | New-GenSeries | Thea (Voice) | — |