Filmography
| Year | Title | Role |
| 2023 | Titanic (25th Anniversary Re-release) (2023) | Rose DeWitt Bukater |
| 2022 | Avatar: The Way of Water (2022) | Ronal |
| 2020 | Ammonite (2020) | Mary Anning |
| 2019 | Manou the Swift | Blanche |
| 2019 | Blackbird (2020) | Jennifer |
| 2018 | Oceans 3D: Our Blue Planet | Narrator |
| 2018 | Buttons, A Christmas Tale | Narrator |
| 2017 | The Mountain Between Us | Alex Martin |
| 2017 | Mary and the Witch's Flower (2017) | Madam Mumblechook |
| 2017 | Wonder Wheel | Ginny |
| 2016 | Triple 9 | Irina Vlaslov |
| 2016 | Collateral Beauty | Claire |
| 2015 | The Divergent Series: Insurgent | Jeanine |
| 2015 | Steve Jobs | Joanna Hoffman |
| 2015 | The Dressmaker | Myrtle "Tilly" Dunnage |
| 2014 | Divergent | Jeanine |
| 2014 | A Little Chaos | Sabine De Barra |
| 2013 | Movie 43 | Beth |
| 2013 | Labor Day | Adele |
| 2011 | Contagion | Dr. Erin Mears |
| 2011 | Carnage (2011) | Nancy Cowen |
| 2009 | A Mother's Courage: Talking Back to Autism | Narrator |
| 2008 | Revolutionary Road | April Wheeler |
| 2006 | All the King's Men (2006) | Anne Stanton |
| 2006 | Flushed Away | Rita |
| 2006 | Little Children | Sarah Pierce |
| 2006 | The Holiday | Iris |
| 2006 | Deep Sea (2006) | Narrator |
| 2005 | Romance & Cigarettes | Tula |
| 2004 | Eternal Sunshine of the Spotless Mind | Clementine Kruczynski |
| 2004 | Finding Neverland | Sylvia Llewelyn Davies |
| 2003 | The Life of David Gale | Elizabeth "Bitsey" Bloom |
| 2001 | Enigma | Hester |
| 2000 | Quills | Madeleine |
| 1999 | Holy Smoke | Ruth Barron |
| 1998 | Hideous Kinky | Julia |
| 1997 | Titanic (1997) | Rose DeWitt Bukater |
| 1996 | Jude | Sue Bridehead |
| 1996 | Hamlet – NT Live 10th Anniversary | Ophelia |
| 1995 | Sense and Sensibility | Marianne Dashwood |
| 1994 | Heavenly Creatures | Juliet Hulme |
