 | Emily Blunt als Mary Poppins |
 | Lin-Manuel Miranda als Jack |
 | Ben Whishaw als Michael Banks |
 | Emily Mortimer als Jane Banks |
 | Pixie Davies als Annabel |
 | Nathanael Saleh als John |
 | Joel Dawson als Georgie |
 | Julie Walters als Ellen |
 | Meryl Streep als Cousin Topsy |
 | Colin Firth als Wilkins / Wolf (voice) |
 | Jeremy Swift als Gooding / Badger (voice) |
 | Kobna Holdbrook-Smith als Frye / Weasel (voice) |
 | Dick Van Dyke als Mr. Dawes Jr. |
 | Angela Lansbury als Balloon Lady |
 | David Warner als Admiral Boom |
 | Jim Norton als Mr. Binnacle |
 | Noma Dumezweni als Miss Penny Farthing |
 | Tarik Frimpong als Angus |
 | Sudha Bhuchar als Miss Lark |
 | Steve Nicolson als Park Keeper |
 | Christian Dixon als The Milkman |
 | Christopher Godwin als Information Desk Clerk |
 | John Dagleish als Courier |
 | Karen Dotrice als Elegant Woman |
 | Ian Conningham als Pub Landlord |
 | Billy Barratt als Street Urchin |
 | Felix Collar als Street Urchin |
| Kate Attwell als Street Urchin |
 | Chris O'Dowd als Shamus the Coachman (voice) |
 | Mark Addy als Clyde the Horse (voice) |
 | Edward Hibbert als Parrot Umbrella (voice) |
| Ash als Willoughby |
| Shay Barclay als Leerie |
| Ashley Birchall als Leerie |
| Johnny Bishop als Leerie |
| Michael Carroll als Leerie |
 | Jon-Scott Clark als Leerie |
 | Leon Cooke als Leerie |
| Jack Harrison-Cooper als Leerie |
| Sean Corrie als Leerie |
| Momar Diagne als Leerie |
| Antony Edwards als Leerie |
| Aston Newman Hannington als Leerie |
| Jake Moyle als Leerie |
| Marlon Pelayo als Leerie |
| James Revell als Leerie |
| Ted Rogers als Leerie |
| Charles Ruhrmund als Leerie |
 | Christopher Scott als Leerie |
| Zac Smith als Leerie |
 | Craig Stein als Leerie |
 | Alex J Sturman als Leerie |
| Jahrel Thomas als Leerie |
| Johnny White als Leerie |
| Teneisha Bonner als Female Dancer |
| Lavinia Fitzpatrick als Female Dancer |
 | Tara Nicole Hughes als Female Dancer |
 | Hannah Kenna-Thomas als Female Dancer |
| Jennifer Leung als Female Dancer |
 | Rachel Muldoon als Female Dancer |
| Cassie Rogers als Female Dancer |
| Lorraine Stewart als Female Dancer |
 | Calvin Chen als Leerie (uncredited) |
 | Johanna Thea als Fairground Attendee (uncredited) |
 | Antonio Raul Corbo als Boy (uncredited) |
 | Raj Awasti als Bank Customer (uncredited) |
 | Fran Targ als Homeless Soup kitchen (uncredited) |
 | Jeremy Azis als Bank Customer 110 (uncredited) |
 | Nina Kumar als Bank Customer (uncredited) |
 | Jag Patel als Corporate Internal Bank Customer (uncredited) |
 | Martyn Mayger als Banker (uncredited) |
 | Steve Carroll als Tramp (uncredited) |
 | David Gambier als Fair Ground Attendee (uncredited) |
| Rob Marshall | Director |
| David Magee | Screenplay |
| P.L. Travers | Novel |
| Marc Platt | Producer |
| Peter King | Hair Designer |
| Rob Marshall | Producer |
| Callum McDougall | Production Manager |
| Bertie Spiegelberg | Production Supervisor |
| Wyatt Smith | Editor |
| Tiffany Little Canfield | Casting |
| Francine Maisler | Casting |
| Hannah Godwin | Production Manager |
| Ben Howarth | First Assistant Director |
| Callum McDougall | Executive Producer |
| Michael Zimmer | Co-Producer |
| Steve Carter | Art Direction |
| Tamsin Dorling | Makeup Artist |
| Simon Elsley | Art Direction |
| John Myhre | Production Design |
| Vicki Stevenson | Art Direction |
| Georgie Whittle | Makeup Artist |
| John DeLuca | Producer |
| Bernard Telsey | Casting |
| Elaine Kusmishko | Art Direction |
| Amanda Dazely | Art Direction |
| Grant Butler | Third Assistant Director |
| Niall Moroney | Supervising Art Director |
| Angus More Gordon | Co-Producer |
| Sandy Powell | Costume Design |
| Alex D. da Silva | Production Manager |
| Claire Grainger | Set Decorating Coordinator |
| Lottie McDowell | Art Department Assistant |
| Jamie Burrows | Draughtsman |
| Jake Corney | Greensman |
| Robin Beavis | Special Effects Supervisor |
| Grace Taylor | Art Department Assistant |
| Ty Teiger | Property Master |
| Sarah Ginn | Assistant Art Director |
| Jennifer Lane | Post Production Supervisor |
| Marc Shaiman | Original Music Composer |
| Rosie Hardwick | Draughtsman |
| Bethany Spence | Greensman |
| Scott Hillier | Rigging Supervisor |
| Caitlin Murray Jones | Modeling |
| Kira Kemble | Draughtsman |
| Lotta Wolgers | Draughtsman |
| Simon Hayes | Production Sound Mixer |
| Laura Collins | Set Dresser |
| Candice White | Draughtsman |
| Renée Tondelli | Supervising Sound Editor |
| James Cullane | Carpenter |
| Simon Gustafsson | Conceptual Illustrator |
| Richard Hardy | Assistant Art Director |
| Sarah Iovino | Art Department Coordinator |
| Josh Sales | Set Dresser |
| Lauren Briggs-Miller | Assistant Art Director |
| Jon Marson | Greensman |
| Dominique Pace | Draughtsman |
| Angus Hale | Greensman |
| Christian Kaestner | VFX Supervisor |
| Michelle Roll | Visual Effects Coordinator |
| Alan Hall | First Assistant Camera |
| Shawn Broes | Visual Effects Editor |
| Camille Paleni | Digital Compositors |
| Leo Keenan | Stunts |
| Billy Gamble | Best Boy Electrician |
| Alan Stewart | Second Unit Director of Photography |
| Andrew Barry | Compositors |
| Sam Horgan | Digital Compositors |
| Gabriel Naveau | Digital Compositors |
| Brock J. Stearn | Digital Compositors |
| Sara Woomer | Visual Effects Coordinator |
| Toby Oliver | Stunts |
| Ian Pead | Stunts |
| Tobias Eedy | First Assistant Camera |
| Gareth Harfoot | Drone Operator |
| Michael Huber | Visual Effects |
| Gary Arthurs | Stunts |
| Kieran Clarke | Stunts |
| Paul Howell | Stunts |
| Alex Fraser | Dolly Grip |
| Peter Robertson | Steadicam Operator |
| Steven Warner | Special Effects Supervisor |
| David Cozens | First Assistant Camera |
| Jack Flemming | Dolly Grip |
| Harry Langston | Electrician |
| David Penfold | First Assistant Camera |
| Jim Capobianco | Animation Supervisor |
| Leslie Lerman | Visual Effects Producer |
| Joshua Toonen | Compositors |
| Cristian Knight | Stunts |
| Mark Mottram | Stunt Coordinator |
| Adam McGrady | Video Assist Operator |
| Ben Wilson | Rigging Supervisor |
| Talia Felber | Production Manager |
| Jack Hughes | VFX Supervisor |
| Leo Pean de Ponfilly | Digital Compositors |
| Conrad Woolfe | Casting Associate |
| Stephane Brisson | Digital Compositors |
| Jason Quintana | CG Supervisor |
| Leo Woodruff | Stunts |
| Angus Benson-Blair | Drone Operator |
| Robert Stoneman | Steadicam Operator |
| Christian Irles | VFX Supervisor |
| Damien Beebe | Camera Operator |
| Julian Bucknall | First Assistant Camera |
| David Smith | Gaffer |
| Stasia Fong | Animation Production Assistant |
| Thomas Dotheij | Visual Effects Technical Director |
| Eric Guaglione | Animation Supervisor |
| Patrick Hall | Digital Compositors |
| Jason Pethtel | Digital Compositors |
| James Woods | Character Designer |
| Laurence Berkani | Visual Effects Producer |
| Carolina Cedres | Visual Effects Coordinator |
| Maxime Sirven | Visual Effects Editor |
| Nick Chopping | Stunts |
| Adam Sculthorp | Aerial Camera |
| Sarah Trevis | Casting Associate |
| Daniel Dow | Stunts |
| Andrew Bradley | Aerial Camera Technician |
| Brandon Brocker | Animation Department Coordinator |
| Tracie Donais | Digital Compositors |
| Annabelle Fordham | Stunts |
| Gabriella Harman | Stunts |
| Harry Gamble | First Assistant Camera |
| Amanda Barrios | Line Producer |
| Russell Hopwood | Compositors |
| John Gamble | Camera Operator |
| Jay Maidment | Still Photographer |
| Dani Rose | Drone Operator |
| Rachel Nadler | Casting Assistant |
| Neil Toddy Todd | Special Effects |
| Zaid Babeel | Visual Effects Coordinator |
| Matt Johnson | VFX Supervisor |
| Ricky Leach | Digital Compositors |
| Phoenix Woung-Bi Lee | Visual Effects Technical Director |
| Jorge Sanchez Fresno | Digital Compositors |
| Kent Blocher | Visual Effects Editor |
| Tyler Cordova | Animation Manager |
| Stewart Probert | Production Manager |
| Brett Schroeder | Lead Animator |
| Justin Pearson | Stunts |
| Dominic Rau | Video Assist Operator |
| Charlie Hayes | Location Manager |
| Mark Berrow | Musician |
| Jim Bruening | Music Editor |
| Phil Allchin | Transportation Captain |
| Michael Kirkman | Driver |
| Rob Lloyd | Driver |
| Luke Keeley | Security |
| Taro Smith | Production Office Assistant |
| Anna Cavaliere | Set Costumer |
| Susan Chika Anisiobi | Production Accountant |
| Jill McCullough | Dialect Coach |
| Peter Trotman | Driver |
| Monique Brown | Assistant Production Coordinator |
| Rachel Kennedy | Publicist |
| Rob Campbell-Bell | Location Manager |
| Yvonne Duckett | Costume Supervisor |
| Oliver Garcia | Assistant Costume Designer |
| Mariette Hendriks | Tailor |
| Charlotte Law | Assistant Costume Designer |
| Meagan Costello | First Assistant Editor |
| Steve Mair | Musician |
| Richard Pryce | Musician |
| Ian Foweraker | Set Costumer |
| Courtney McClain | Assistant Costume Designer |
| Eleanor Downey | Location Manager |
| Ted Leaning | Driver |
| Ali James | Location Manager |
| Lara Newman | Key Set Costumer |
| Michael Higham | Executive Music Producer |
| Lewis Morison | Music Editor |
| Rachel Bolt | Musician |
| David Davenport | Costume Supervisor |
| Carlos Fontanarrosa | Key Set Costumer |
| Roger Linley | Musician |
| Katerina Ruskova | Transportation Coordinator |
| David Rosenbaum Jr. | Driver |
| Cynthia Black | Set Costumer |
| Caroline Fallon | Costume Coordinator |
| Clive Shaw | Driver |
| Lisa Vick | Script Supervisor |
| Anthony Brookman | Key Set Costumer |
| Debbie Scott | Assistant Costume Designer |
| Michael Higham | Music Supervisor |
| Emma Savin | Driver |
| Elliott Cobley | Production Office Assistant |
| Martin Kingsley | Assistant Property Master |
| Josue Clotaire Fleurimond | Conceptual Illustrator |
| Angus More Gordon | Unit Production Manager |
| Paula Price | Key Hair Stylist |
| Gordon Sim | Set Decoration |
| Dion Beebe | Director of Photography |
| Paula Price | Key Makeup Artist |
| James S. Baker | Storyboard Artist |
| David Magee | Story |
| John DeLuca | Story |
| Rob Marshall | Story |
| John DeLuca | Producer |
| George Kirby | Stunts |
| Alexander Johnson | Assistant Editor |
| Jeff Atmajian | Orchestrator |
| Paul Gemignani | Music Supervisor |
| Paul Gemignani | Conductor |
| Michael Starobin | Orchestrator |
| Jeni Meredith | Transportation Coordinator |
| Jeff Woodbridge | Carpenter |
| Marc Shaiman | Songs |
| Marc Shaiman | Lyricist |
| Scott Wittman | Lyricist |
| Thomas Napper | Second Unit Director |
| Jessica Hooker | Stunt Double |
| Lucy Allen | Stunts |
