 | Dev Patel als Srinivasa Ramanujan |
 | Jeremy Irons als G. H. Hardy |
 | Toby Jones als Littlewood |
 | Devika Bhise als Janaki |
 | Stephen Fry als Sir Francis Spring |
 | Kevin McNally als Major MacMahon |
 | Jeremy Northam als Bertrand Russell |
 | Anthony Calf als Howard |
 | Pádraic Delaney als Beglan |
 | Shazad Latif als Chandra Mahalanobis |
 | Roger Narayan als Scribe |
 | Arundathi Nag als Komalatammal |
 | Dhritiman Chatterjee als Narayana Iyer |
 | Richard Johnson als Vice Master Henry Jackson |
 | Raghuvir Joshi als Narasimha |
 | Malcolm Sinclair als Professor Cartwright |
 | San Shella als Dr. Muthu |
 | Richard Cunningham als Hobson |
| Thomas Bewley als Baker |
| Pip Barclay als Student |
 | David Shaw-Parker als Porter |
 | Dominic Cazenove als Waiter |
 | Nicholas Agnew als Andrew Hartley |
| Alan Booty als Grocer |
 | Shenagh Govan als Postal Worker |
 | Alexander Forsyth als Cadet |
 | Enzo Cilenti als Doctor |
 | Elaine Caulfield als Hospital Nurse |
 | Alex Bartram als Hospital Doctor |
| Christopher Ravenscroft als J. J. Thompson |
 | Imogen Sage als Nursie (uncredited) |
| Matt Brown | Director |
| Matt Brown | Writer |
| Matt Brown | Producer |
| Simon Moseley | Line Producer |
| Matt Brown | Screenplay |
| Larry Smith | Director of Photography |
| Joe Thomas | Producer |
| Reg Poerscout-Edgerton | Casting |
| Coby Brown | Original Music Composer |
| Ann Maskrey | Costume Design |
| Luciana Arrighi | Production Design |
| JC Bond | Editor |
| Huw Penallt Jones | Co-Producer |
| Robert Kanigel | Co-Producer |
| Mark Montgomery | Executive Producer |
| Manraj S. Sekhon | Executive Producer |
| Min-Li Tan | Executive Producer |
| Pamela Godfrey | Executive Producer |
| Joseph Newton Cohen | Executive Producer |
| Richard Toussaint | Executive Producer |
| Gary Ellis | Executive Producer |
| Swati Bhise | Executive Producer |
| Shail Shah | Executive Producer |
| Tristine Skyler | Executive Producer |
| Sofia Sondervan | Producer |
| Jon Katz | Producer |
| Edward R. Pressman | Producer |
| Jim Young | Producer |
| Robert Kanigel | Novel |
| Crispin Layfield | Stunt Coordinator |
| Masaaki Tanaka | Executive Producer |
| Compton Ross | Executive Producer |
| Phil Hunt | Executive Producer |
| Swati Bhise | Associate Producer |
| Sam Raj Kumar Wilson | Associate Producer |
| Masayuki Takase | Associate Producer |
| Nariaki Kumagi | Associate Producer |
| Toshinori Nakai | Associate Producer |
| James Passin | Associate Producer |
| Anthony Timothy Morris | Associate Producer |
| Audrey Kathleen Chong | Associate Producer |
| Parveen Shereef | Associate Producer |
| Apparswamy Subramanian | Associate Producer |
| Vinod Kumar | Associate Producer |
| Melissa Robyn Glassman | Associate Producer |
| Nick Bain | Associate Producer |
| Sarah Ramey | Associate Producer |
| David Cochrane | Associate Producer |
| Anand Tharmaratnam | Associate Producer |
| Tayyab Madni | Associate Producer |
| Manjul Bhargava | Associate Producer |
| Ken Ono | Associate Producer |
| Alice Dawson | Line Producer |
| Lydia Currie | First Assistant Director |
| Sarah Louise Kay | Production Accountant |
| Ian Voigt | Production Sound Mixer |
| Cate Hall | Makeup Designer |
| Cate Hall | Hair Designer |
| Andrew Munro | Supervising Art Director |
| Liz Ainley | Set Decoration |
| Arthur Wicks | Property Master |
| Ben Gladstone | Location Manager |
| San Davey | Script Supervisor |
| Meg Clark | Post Production Supervisor |
| Simon Chase | Supervising Dialogue Editor |
| Samir Foco | Supervising Sound Effects Editor |
| Paul Wheeldon | First Assistant "A" Camera |
| Dan Gamble | Second Assistant "A" Camera |
| Robert Binnall | "B" Camera Operator |
| Ray Meere | First Assistant "B" Camera |
| Sean Connor | First Assistant "B" Camera |
| Andrew Jones | Second Assistant "B" Camera |
| Derek Walker | Steadicam Operator |
| Oliver Squire | Camera Trainee |
| Jack Knott | Camera Trainee |
| Ronan Murphy | Key Grip |
| Kevin Foy | Grip |
| Kev Marchant | Assistant Grip |
| Mardon de Carvalho | Digital Imaging Technician |
| Victoria Zalin | Production Coordinator |
| Abby Mills | Assistant Production Coordinator |
| Laura Evans | Production Secretary |
| Aaron Hopkins | Production Assistant |
| Jennie Fava | Second Assistant Director |
| Liam Shaw | Third Assistant Director |
| Lillie Jeffrey | Casting Associate |
| Katy Covell | Casting Assistant |
| Ollie Gilbert | Casting Assistant |
| Raghuvir Joshi | Dialect Coach |
| Pamela Godfrey | Unit Publicist |
| Richard Blanshard | Still Photographer |
| John David Gunkle | Unit Manager |
| Jessica Woodland | Assistant Location Manager |
| Jojo Warne | Assistant Location Manager |
| Justin Warburton-Brown | Art Direction |
| Damian Léon Watts | Assistant Art Director |
| Liz Colbert | Graphic Designer |
| Lizzie Kilham | Standby Art Director |
| Melissa Herrington | Storyboard Artist |
| Caitlyn Carradine | Storyboard Artist |
| Laura Miller | Art Department Assistant |
| Max Klaentschi | Art Department Assistant |
| Nicola Rapley | Costume Supervisor |
| Ann Taylor | Assistant Costume Designer |
| Micka Agosta | Key Costumer |
| Michael McDermott | Gaffer |
| Louise Coles | Makeup & Hair |
| Annette Field | Makeup & Hair |
| kyle mann | Best Boy Electric |
| Larry Park | Rigging Gaffer |
| Barry McCulloch | Electrician |
| Stefan Mitchell | Electrician |
| Jack Powell | Electrician |
| Richard Van Den Bergh | Special Effects Supervisor |
| John Moolenschot | Construction Manager |
| Barrie Williams | Transportation Captain |
| Trisha Joyce | Set Medic |
| Elyse Holloway | First Assistant Editor |
| Nigel Mills | Dialogue Editor |
| Phil Lee | Sound Effects Editor |
| Will Riley | Sound Effects Editor |
| Robert Chen | Sound Effects Editor |
| Richard Henderson | Music Editor |
| Del Spiva | Music Editor |
| Peter Clarke | Music Editor |
| Tim Cavagin | Sound Re-Recording Mixer |
| Adam Mendez | Foley Mixer |
| Jason Swanscott | Foley Artist |
| Travis MacKay | ADR Mixer |
| Peter Gleaves | ADR Mixer |
| Andy Stallabrass | ADR Mixer |
| Piers Hampton | Visual Effects Supervisor |
| Tami Lester | Music Supervisor |
| Stephen Coleman | Orchestrator |
