| Title | Star As | Genre | Info |
|---|---|---|---|
| Good Luck to You, Leo Grande | Nancy Stokes | - | - |
| Dolittle | Polynesia (voice) | - | aka "The Voyage of Doctor Dolittle" |
| How to Build a Girl | Amanda | - | - |
| Late Night | Katherine Newbury | - | - |
| Men in Black International | Agent O | - | aka "Untitled Men in Black Spin-Off" |
| Missing Link | (voice) | - | - |
| Years and Years | - | TV | - |
| King Lear | Goneril | - | - |
| The Children Act | Fiona Maye | - | - |
| Beauty and the Beast (2017) | Mrs. Potts | - | - |
| Sea Sorrow | - | - | - |
| The Meyerowitz Stories (New and Selected) | Maureen | - | aka "Yen Din Ka Kissa" |
| Alone in Berlin | Anna Quangel | - | - |
| Bridget Jones's Baby | Dr. Rawling | - | - |
| A Walk in the Woods | Catherine Bryson | - | - |
| Barney Thomson | Cemolina | - | aka "The Legend of Barney Thomson" |
| Burnt | Dr. Rosshilde | - | aka "Adam Jones" |
| Love Song | - | - | - |
| Effie Gray | Lady Eastlake | - | aka "Effie" |
| Men, Women & Children | Narrator (voice) | - | - |
| Beautiful Creatures | Mrs. Lincoln / Sarafine | - | - |
| Saving Mr. Banks | P.L. Travers | - | - |
| The Love Punch | Kate | - | - |
| Brave | Queen Elinor (voice) | - | aka "Bear and the Bow" |
| Men in Black 3 | Agent O | - | - |
| Harry Potter and the Deathly Hallows: Part II | Sybill Trelawney | - | - |
| Nanny McPhee Returns | Nanny McPhee | - | aka "Nanny McPhee and the Big Bang" |
| The Song of Lunch | She | TM | - |
| An Education | Headmistress | - | - |
| Pirate Radio | Charlotte | - | aka The Boat That Rocked |
| Brideshead Revisited | Lady Marchmain | - | - |
| Last Chance Harvey | Kate | - | - |
| Harry Potter and the Order of the Phoenix | Sybil Trelawney | - | - |
| Stranger Than Fiction | Kay Eiffel | - | - |
| Nanny McPhee | Nanny McPhee | - | - |
| Harry Potter and the Prisoner of Azkaban | Professor Sybil Trelawney | - | aka Harry Potter and the Prisoner of Azkaban: The IMAX Experience |
| Angels in America | The Angel of America/Nurse Emily/Homeless Woman | TV | - |
| Imagining Argentina | Cecilia Rueda | - | - |
| Love Actually | Karen | - | - |
| Treasure Planet | Captain Amelia (voice) | - | - |
| Wit | Vivian Bearing | TM | - |
| Maybe Baby | Druscilla | - | - |
| Judas Kiss | FBI Agent Sadie Hawkins | - | - |
| Primary Colors | Susan Stanton | - | aka Perfect Couple |
| Theatre Night | Catherine Winslow | TV | - |
| Hospital! | Elephant Woman | TM | - |
| The Winter Guest | Frances | - | - |
| Carrington | Dora Carrington | - | - |
| Sense and Sensibility | Elinor Dashwood | - | - |
| Junior | Dr. Diana Reddin | - | - |
| My Father the Hero | Isabel | - | aka My father, ce h�ros (France) |
| The Blue Boy | Marie Bonnar | TM | - |
| In the Name of the Father | Gareth Peirce | - | - |
| Much Ado About Nothing | Beatrice | - | - |
| The Remains of the Day | Miss Kenton | - | - |
| Howards End | Margaret Schlegel | - | - |
| Peter's Friends | Maggie Chester | - | - |
| Dead Again | Grace/Margaret Strauss | - | - |
| Impromptu | Duchess D'Antan | - | - |
| The Winslow Boy | Catherine Winslow | TM | - |
| Henry V | Princess Katherine de Valois | - | - |
| Knuckle | - | TM | - |
| Look Back in Anger | Alison Porter | TM | - |
| The Tall Guy | Kate Lemmon | - | - |
| Thompson | Various roles | TV | - |
| Fortunes of War | Harriet Pringle | TV | - |
| Tutti Frutti | Suzy Kettles | TV | - |
| Assaulted Nuts | Various | TV | - |
| Emma Thompson: Up for Grabs | - | TM | - |
| Alfresco | Various roles | TV | - |
| The Crystal Cube | Jackie Meld/Various roles | TM | - |
| Cambridge Footlights Revue | Various Characters | TM | - |
| There's Nothing to Worry About! | Mrs. Wally | TV | - |