 | Phoenix Laroche als William |
 | Alex Lawther als Velveteen Rabbit (voice) |
 | Samantha Colley als Mother |
 | Leonard Buckley als Father |
 | Tilly Vosburgh als Mary "Momo" |
 | Helena Bonham Carter als Wise Horse (voice) |
 | Lois Chimimba als Car (voice) |
 | Paterson Joseph als King (voice) |
 | Clive Rowe als Lion (voice) |
 | Ellie Mejia als Miss Forrester |
 | Conor Hamill als William's Friend |
| Paul Sparkes als Removal Man |
| Kiefer Moriarty als Adult at Party |
| Elizabeth O'Toole als Lucy |
| Jack Finn als Child |
| Declan Mills als George |
 | Edward Baker-Duly als Doctor |
 | Sean Duggan als Teacher |
 | Nathaniel Parker als Male Rabbit (voice) |
 | Bethany Antonia als Female Rabbit (voice) |
 | Nicola Coughlan als Playroom Fairy (voice) |
| Martin Pope | Producer |
| Margery Williams | Book |
| Jennifer Perrott | Director |
| Rick Thiele | Animation Director |
| Tom Bidwell | Screenplay |
| Michael Rose | Executive Producer |
| Jane Hawley | Co-Producer |
| Simon Quinn | Other |
| Tom Bidwell | Co-Executive Producer |
| James Mather | Director of Photography |
| Anna Rackard | Production Designer |
| Sarah Brewerton | Editor |
| Anne Dudley | Original Music Composer |
| Eimer Ní Mhaoldomhnaigh | Costume Designer |
| Karen Lindsay-Stewart | Casting Director |
| Emily Jacobs | Casting Director |
| Lynn Johnson | Makeup Designer |
| Sandra Kelly | Hair Designer |
| Adrian Rhodes | Supervising Sound Editor |
| Adrian Rhodes | Sound Mixer |
| Simon J. Willis | Sound Mixer |
| Howard Gibbins | Line Producer |
| Bianca Rodway | Associate Producer |
| Pedro Lino | Animation Supervisor |
| Jonathan Quinlan | First Assistant Director |
| Richard Cosgrove | Second Assistant Director |
| David Ivory | Third Assistant Director |
| Greg McGuinness | Steadycam |
| Greg McGuinness | "A" Camera Operator |
| Cormac O'Maille | First Assistant Camera |
| Shane Rowan | Second Assistant Camera |
| Caoimhe Hernon | Second Assistant Camera |
| Angela Senior | Script Supervisor |
| Ewans Clement | Visual Effects Producer |
| Guillaume Ruegg | VFX Supervisor |
| James McGuire | Gaffer |
| Emmanuelle Stannard | Production Coordinator |
| Ashifa Lalani | Production Accountant |
| Tarn Harper | Production Accountant |
| Debbie Millington | Costume Supervisor |
| Declan Sheridan | Art Direction |
| Victoria Alexandra Carney | Assistant Art Director |
| Kevin Downey | Set Decoration |
| Patricia Douglas | Graphic Designer |
| Colm Bassett | Construction Manager |
| Perry Allen | Painter |
| Dylan Brennan | Scenic Artist |
| Cathy Pearson | Location Manager |
| Louise Seymour | Post Production Supervisor |
| Vanessa Taylor | Colorist |
| Jemma Fox | Online Editor |
| Pete Gates | Dialogue Editor |
| Alastair Sirkett | Sound Effects Editor |
| Franziska Treutler | Foley Editor |
| Roger Dudley | Music Producer |
| Mat Bartram | Sound Recordist |
| Laurence Love Greed | Music Editor |
| Jason Nuttall | CG Supervisor |
| Mario Ucci | CG Supervisor |
| Roly Edwards | Lead Animator |
| Magno Borgo | Compositing Supervisor |
| Claudia Brugnaletti | Character Designer |
| Til Frohlich | Supervising Art Director |
