| Blitz | 2024 | Actress | Rita |
| The Outrun | 2024 | Actress | Rona |
| Foe | 2023 | Actress | Hen |
| The Tragedy of Macbeth | 2023 | Actress | Lady Macbeth |
| See How They Run | 2022 | Actress | Constable Stalker |
| The French Dispatch | 2021 | Actress | Junkie |
| Ammonite | 2020 | Actress | Charlotte Murchison |
| Little Women | 2019 | Actress | Jo March |
| Mary Queen of Scots | 2018 | Actress | Mary Stuart |
| The Seagull | 2018 | Actress | Nina |
| Great Performers: Horror Show | 2017 | Actress | The Mannequin |
| On Chesil Beach | 2017 | Actress | Florence Ponting |
| Lady Bird | 2017 | Actress | Lady Bird McPherson |
| Loving Vincent | 2017 | Actress | Marguerite Gachet (voice) |
| Ed Sheeran: Galway Girl | 2017 | Actress | Girl |
| Hozier: Cherry Wine | 2016 | Actress | Woman |
| Weepah Way for Now | 2015 | Actress | Emily (voice) |
| Brooklyn | 2015 | Actress | Eilis |
| Stockholm, Pennsylvania | 2015 | Actress | Leia Dargon |
| Robot Chicken | 2014 | Actress | Merida |
| Lost River | 2014 | Actress | Rat |
| Muppets Most Wanted | 2014 | Actress | Ballerina |
| The Grand Budapest Hotel | 2014 | Actress | Agatha |
| Justin and the Knights of Valour | 2013 | Actress | Talia (voice) |
| How I Live Now | 2013 | Actress | Daisy |
| Natasha Khan & Jon Hopkins: Garden's Heart Music Video | 2013 | Actress | |
| The Host | 2013 | Actress | Melanie Stryder |
| Byzantium | 2012 | Actress | Eleanor |
| Violet & Daisy | 2011 | Actress | Daisy |
| Hanna | 2011 | Actress | Hanna |
| The Way Back | 2010 | Actress | Irena |
| The Secret World of Arrietty | 2010 | Actress | Arrietty (UK version, voice, uncredited) |
| The Lovely Bones | 2009 | Actress | Susie Salmon |
| Saturday Night Live | 2009 | Actress | Audience Member (uncredited) |
| City of Ember | 2008 | Actress | Lina Mayfleet |
| Death Defying Acts | 2007 | Actress | Benji McGarvie |
| Atonement | 2007 | Actress | Briony Tallis, aged 13 |
| The Christmas Miracle of Jonathan Toomey | 2007 | Actress | Celia Hardwick |
| I Could Never Be Your Woman | 2007 | Actress | Izzie |
| Proof | 2005 | Actress | Orla Boland |
| The Clinic | 2003–2004 | Actress | Rhiannon Geraghty |
| The Outrun | 2024 | Producer | producer (produced by) |
| Ammonite | 2020 | Soundtrack | performer: "Romanze in A Minor" |
| Killing Eve | 2020 | Soundtrack | performer: "Tell Me" |
| Rhonda: The Birth of a Queen Short | 2019 | Soundtrack | performer: "Oops! ... I Did It Again" |
| Neon City | 2018 | Soundtrack | Soundtrack ("Tell Me") |
| Riverdale | 2017 | Soundtrack | performer: "Tell Me" (uncredited) |
| Lost River | 2014 | Soundtrack | performer: "Whisper", "Tell Me" (uncredited), "Rat, Face, & Bully" (uncredited) |
| I Could Never Be Your Woman | 2007 | Soundtrack | performer: "Oops! ...I Did It Again", "Ironic" |
| Page Six: YouTube Channel TV Series | 2025 | Self | Self |
| 2025 EE BAFTA Film Awards | 2025 | Self | Self - Nominee |
| The IFTA Awards 2025 TV Special | 2025 | Self | Self |
| Variety Studio: Actors on Actors | 2015–2025 | Self | Self - Guest |
| W Magazine TV Series | 2018–2025 | Self | Self |
| Brittany Broski's Royal Court | 2024 | Self | Self |
| SAG Foundation Conversations | 2024 | Self | Self |
| Vanity Fair: YouTube Channel | 2024 | Self | Self |
| In the Envelope: The Actor's Podcast Podcast Series | 2024 | Self | Self - Guest |
| Today | 2015–2024 | Self | Self - Guest |
| The Tonight Show Starring Jimmy Fallon | 2015–2024 | Self | Self |
| Christy Brown: Self Portrait TV Special | 2024 | Self | Self - Poetry Recital |
| The Awardist Podcast Series | 2024 | Self | Self - Guest |
| The Graham Norton Show | 2013–2024 | Self | Self - Guest |
| British Vogue TV Series | 2021–2024 | Self | Self |
| Arts24 TV Series | 2024 | Self | Self - Interviewee |
| Konbini | 2018–2024 | Self | Self |
| Jimmy Kimmel Live! | 2013–2024 | Self | Self - Guest |
| Letterboxd TV Series | 2024 | Self | Self |
| Soundtracking with Edith Bowman | 2024 | Self | Self |
| The 76th Primetime Emmy Awards | 2024 | Self | Self - Audience Member |
| Morgenmagazin | 2024 | Self | Self |
| Harper's Bazaar UK TV Series | 2024 | Self | Self |
| Deadline Studio | 2024 | Self | Self |
| IMDb on the Scene | 2024 | Self | Self - Guest |
| Variety Studio | 2015–2024 | Self | Self |
| THR Studio at Park City TV Mini Series | 2024 | Self | Self |
| Hollywood First Look | 2020–2023 | Self | Self |
| LADbible Entertainment TV Series | 2022 | Self | Self |
| Hollywood Insider | 2019–2022 | Self | Self |
| Entertainment Tonight | 2018–2020 | Self | Self |
| The United Nations Association 2020 Global Citizen Awards & 13th Annual 2020 West Coast Global Forum | 2020 | Self | Self |
| Bow Street Meets TV Series | 2020 | Self | Self |
| E! Live from the Red Carpet | 2016–2020 | Self | Self |
| The Oscars | 2020 | Self | Self - Nominee |
| EE British Academy Film Awards | 2020 | Self | Self - Nominee |
| Celebrity Page | 2017–2020 | Self | Self |
| The 25th Annual Critics' Choice Awards | 2020 | Self | Self - Nominee |
| La boîte à questions | 2020 | Self | Self |
| 2020 Golden Globe Awards | 2020 | Self | Self - Nominee |
| Días de cine | 2019 | Self | Self - Interviewee |
| This Morning | 2018–2019 | Self | Self |
| The One Show | 2019 | Self | Self |
| CBS News Sunday Morning with Jane Pauley | 2016–2019 | Self | Self |
| ScreenSlam | 2013–2019 | Self | Self |
| C à vous | 2019 | Self | Self |
| Live with Kelly and Mark | 2016–2019 | Self | Self |
| Late Night with Seth Meyers | 2017–2019 | Self | Self |
| The Late Show with Stephen Colbert | 2016–2019 | Self | Self |
| The Ellen DeGeneres Show | 2011–2019 | Self | Self - Guest |
| The United Nations Association 2019 Global Citizen Awards & 12th Annual West Coast Global Forum | 2019 | Self | Self |
| Loving Vincent: The Impossible Dream | 2019 | Self | Self |
| Texting with theSkimm TV Series | 2019 | Self | Self |
| Lorraine | 2018–2019 | Self | Self - Guest |
| 2019 Golden Globe Awards | 2019 | Self | Self - Presenter |
| Sunday AM | 2019 | Self | Self |
| CNN New Year's Eve Live with Anderson Cooper & Andy Cohen TV Special | 2018 | Self | Self |
| Sidewalks Entertainment | 2011–2018 | Self | Self - Guest |
| Watch What Happens Live with Andy Cohen | 2018 | Self | Self |
| Good Morning America | 2013–2018 | Self | Self - Guest |
| Good Morning Britain | 2018 | Self | Self - Plays Mary Stuart in Mary Queen of Scots |
| IMDb Interviews | 2018 | Self | Self - Guest |
| Made in Hollywood | 2009–2018 | Self | Self |
| Dish Nation | 2018 | Self | Self |
| The Oscars Opening Ceremony: Live from the Red Carpet | 2018 | Self | Self |
| The Oscars | 2018 | Self | Self - Nominee |
| 33rd Film Independent Spirit Awards | 2018 | Self | Self - Nominee |
| Sunday Today with Willie Geist | 2018 | Self | Self - Guest |
| The EE British Academy Film Awards | 2018 | Self | Self - Nominee |
| Quotidien | 2018 | Self | Self |
| The IMDb Show | 2018 | Self | Self - Guest |
| Close Up with the Hollywood Reporter | 2018 | Self | Self |
| Trainee Filmmakers Short | 2018 | Self | Self |
| 24th Annual Screen Actors Guild Awards | 2018 | Self | Self - Presenter & Nominee |
| The 23rd Annual Critics' Choice Awards | 2018 | Self | Self |
| 75th Golden Globe Awards | 2018 | Self | Self - Winner |
| Variety Screening Series TV Mini Series | 2015–2017 | Self | Self |
| Saturday Night Live | 2017 | Self | Self - Host |
| The Talk | 2017 | Self | Self |
| The Late Late Show with James Corden | 2015–2017 | Self | Self |
| Watching, Waiting | 2017 | Self | Self (credit only) |
| The Envelope: Oscar Roundtables TV Series | 2016 | Self | Self |
| The 70th Annual Tony Awards | 2016 | Self | Self - Presenter |
| Birthday Stories with Lynn Hirschberg | 2016 | Self | Self |
| Brooklyn: Featurette Video | 2016 | Self | Self |
| The Oscars | 2016 | Self | Self - Nominee |
| The EE British Academy Film Awards | 2016 | Self | Self - Nominee |
| 22nd Annual Screen Actors Guild Awards | 2016 | Self | Self - Nominee & Presenter |
| Access Hollywood | 2008–2016 | Self | Self |
| 21st Annual Critics' Choice Awards | 2016 | Self | Self |
| 73rd Golden Globe Awards | 2016 | Self | Self - Nominee |
| Extra | 2016 | Self | Self |
| The IMDb Studio at Sundance | 2015 | Self | Self |
| The British Academy Britannia Awards | 2015 | Self | Self - Presenter |
| Film '72 | 2015 | Self | Self - Interviewee |
| TFI Friday | 2015 | Self | Self |
| Cinema 3 | 2011–2014 | Self | Self - Interviewee |
| The Grand Budapest Hotel: Creating the Hotel | 2014 | Self | Self |
| The Grand Budapest Hotel: The story | 2014 | Self | Self |
| Rencontres de cinéma | 2014 | Self | Self |
| The Jonathan Ross Show | 2013 | Self | Self - Guest |
| Good Day L.A. | 2013 | Self | Self - Guest |
| Anderson Live | 2013 | Self | Self |
| Big Morning Buzz Live | 2013 | Self | Self - Guest |
| Beyond the Trailer | 2013 | Self | Self |
| Weekend Ticket | 2013 | Self | Self |
| 10th Annual Irish Film & Television Awards TV Special | 2013 | Self | Self - Guest Presenter |
| Electric Burma | 2012 | Self | Self |
| Hanna: The Wide World of 'Hanna' Video | 2011 | Self | Self - Actress |
| Hanna: Central Intelligence Allegory | 2011 | Self | Self - Actress |
| Hanna: Adapt or Die | 2011 | Self | Self - Actress |
| Breakfast | 2011 | Self | Self - Guest |
| Film Fiend | 2011 | Self | Self - Guest |
| Attack of the Show! | 2011 | Self | Self - Guest |
| Up Close with Carrie Keagan | 2011 | Self | Self - Guest |
| 8th Annual Irish Film and Television Awards | 2011 | Self | Self |
| Janela Indiscreta | 2010 | Self | Self |
| Xposé | 2009–2010 | Self | Self |
| The Orange British Academy Film Awards | 2010 | Self | Self - Nominee |
| The 7th Annual Irish Film and Television Awards | 2010 | Self | Self - Winner & Presenter |
| Live from Studio Five | 2010 | Self | Self |
| Guión busca estrella | 2010 | Self | Self |
| 15th Annual Critics' Choice Movie Awards | 2010 | Self | Self |
| The Hour | 2010 | Self | Self |
| The Project | 2009 | Self | Self |
| The Late Late Show | 2009 | Self | Self - Guest |
| The 6th Annual Irish Film and Television Awards | 2009 | Self | Self - Winner |
| Fred | 2008 | Self | Self |
| Bringing the Past to Life: The Making of 'Atonement' | 2008 | Self | Self |
| An Evening at the Academy Awards | 2008 | Self | Self |
| La noche de los Oscar TV Series | 2008 | Self | Self |
| The 80th Annual Academy Awards | 2008 | Self | Self - Nominee |
| ABC News Breakfast | 2024 | Archive Footage | Self - Actor |
| Movie Night Extravaganza | 2022 | Archive Footage | Self (archive footage) |
| Nostalgia Critic | 2022 | Archive Footage | Self (archive footage) |
| The Critical Drinker | 2022 | Archive Footage | Self (archive footage) |
| Moments Within Moments | 2021 | Archive Footage | Self (archive footage) |
| No Small Parts | 2020 | Archive Footage | Self (archive footage) |
| Celebrity Page | 2017–2020 | Archive Footage | Self (archive footage) |
| Live with Kelly and Mark | 2020 | Archive Footage | Self (archive footage) |
| Charisma on Command | 2019 | Archive Footage | Self (archive footage) |
| Entertainment Tonight | 2016–2019 | Archive Footage | Self (archive footage) |
| The Movies | 2019 | Archive Footage | Lady Bird McPherson (archive footage) |
| Hoy nos toca | 2018 | Archive Footage | Self - Lady Bird (archive footage) |
| Brooklyn: Deleted Scenes Video | 2016 | Archive Footage | Eilis (archive footage, uncredited) |
| Welcome to the Basement | 2016 | Archive Footage | Eilis (archive footage) |
| The Insider | 2016 | Archive Footage | Self (archive footage) |
| Extra | 2016 | Archive Footage | Self (archive footage) |
| The Graham Norton Show | 2013 | Archive Footage | Self (archive footage) |
| Hanna: Anatomy of a Scene - The Escape from Camp G Video | 2011 | Archive Footage | Self - Actress |
| Oscar, que empiece el espectáculo | 2008 | Archive Footage | Briony Tallis - aged 13 (archive footage, uncredited) |