 | Sally Hawkins als Mum |
 | Cillian Murphy als Dad |
 | Raffey Cassidy als Becky |
 | Aaron MacGregor als Michael |
 | Ken Watanabe als Kensuke |
 | Alfred Kodai Berglund als Michiya (Kensuke's Son) |
 | Ken Ochiai als Nagasaki Announcer |
 | Cavin Cornwall als Additional Voices |
| Neil Boyle | Director |
| Kirk Hendry | Director |
| Courtney Pledger | Executive Producer |
| Stéphan Roelants | Producer |
| Tim Morris | Executive Producer |
| Michael Morpurgo | Novel |
| Ruth Fielding | Producer |
| Bill Godfrey | Executive Producer |
| Anna Webster | Associate Producer |
| Frank Cottrell Boyce | Screenplay |
| Sarah Radclyffe | Producer |
| Barnaby Spurrier | Producer |
| Camilla Deakin | Producer |
| Stuart Hancock | Music |
| Richard Overall | Editor |
| Lucy Bevan | Casting |
| Michael Shorten | Art Direction |
| Clare Hernon | Production Manager |
| Ana Marisa Romualdo | Production Coordinator |
| Lilly Blazewicz | Foley Editor |
| Paula Boram | Foley Artist |
| Kaspar Broyd | Sound Effects Editor |
| Will Cohen | Sound Re-Recording Mixer |
| Will Cohen | Supervising Sound Editor |
| Will Cohen | Sound Designer |
| Raphaela Dowding-Green | Foley Editor |
| George Elliott | Sound Mix Technician |
| Paul Iché | Foley Editor |
| Gareth Rhys Jones | Foley Artist |
| Julien Pirrie | Foley Mixer |
| Adam Smyth | Dialogue Editor |
| Adam Smyth | Score Engineer |
| Jim Stewart | Sound Effects Editor |
| Thomas Chew | Visual Effects Compositor |
| Kai Davies | Visual Effects Compositor |
| Maëlle Richard de Vesvrotte | Visual Effects Compositor |
| Matt Hawker | Visual Effects Compositor |
| Weronika Holak | Visual Effects Compositor |
| Neil Martin | Visual Effects Compositor |
| Jordanne Richards | Visual Effects Compositor |
| Tony Rowlands | Visual Effects Compositor |
| Klaudia Skalska | Visual Effects Compositor |
| Luke Inderwick | Visual Effects Compositor |
| Dominika Mina Brodowska | Animation |
| Aude Carpentier | Animation |
| Irene Corral de Gaspar | Animation |
| Gary Dunn | Animation |
| Victor Ens | Animation |
| Gerry Gallego | Animation |
| Uli Meyer | Animation |
| Hannah Privett | Animation |
| Olivia Grant | Casting Associate |
| Katherine Jamieson | Colorist |
| Sumit Malhotra | Color Assistant |
| Marie Valentino | Digital Intermediate Producer |
| Karen Crossan | Music Coordinator |
| Gary Welch | Music Supervisor |
| Vanessa Wheeler | Script |
| Adrian Politowski | Producer |
| Nadia Khamlichi | Executive Producer |
| Manddy Wyckens | Character Designer |
| Peter Dodd | Animation Director |
