Nanny McPhee appears at the door of a harried young mother who is trying to run the family farm while her husband is away at war. But once she’s arrived, Nanny discovers that the children are fighting a war of their own against two spoiled city cousins who have just moved in. Relying on everything from a flying motorcycle and a statue that comes to life to a tree-climbing piglet and a baby elephant, Nanny uses her magic to teach her mischievous charges five new lessons.
Unfortunately the movie Nanny McPhee and the Big Bang is not yet available on HBO Max.
| Writing | Emma Thompson | Screenplay |
| Directing | Susanna White | Director |
| Production | Emma Thompson | Executive Producer |
| Production | Debra Hayward | Executive Producer |
| Production | Tim Bevan | Producer |
| Production | Lindsay Doran | Producer |
| Production | Eric Fellner | Producer |
| Production | Liza Chasin | Executive Producer |
| Camera | Mike Eley | Director of Photography |
| Costume & Make-Up | Jacqueline Durran | Costume Design |
| Writing | Christianna Brand | Novel |
| Editing | Sim Evan-Jones | Editor |
| Lighting | Jonny Franklin | Electrician |
| Sound | James Newton Howard | Original Music Composer |
| Sound | Simon Hayes | Production Sound Mixer |
| Production | Abigail Barbier | ADR Voice Casting |
| Crew | Paul Lowe | Stunt Double |
| Production | Louis Elman | ADR Voice Casting |
| Crew | Ray De-Haan | Stunts |
| Production | Millie Scalchi | Casting Assistant |
| Crew | Paul Lowe | Stunts |
| Crew | Paul Heasman | Stunt Coordinator |
| Crew | Ray De-Haan | Stunt Double |
| Crew | Tina Maskell | Stunts |
| Production | Pippa Hall | Casting |
| Crew | Lee Sheward | Stunt Coordinator |
| Crew | Nick Wilkinson | Stunts |
| Production | Lucy Bevan | Casting |
| Crew | Annabel Canaven | Stunts |
| Art | Simon Elliott | Production Design |
| Costume & Make-Up | Peter Swords King | Hair Designer |
| Costume & Make-Up | Nik Williams | Special Effects Makeup Artist |
| Sound | Nina Hartstone | Supervising Dialogue Editor |
| Art | Suzanne Austin | Art Direction |
| Art | Nick Dent | Art Direction |
| Costume & Make-Up | Sarah Weatherburn | Wigmaker |
| Costume & Make-Up | Matthew Smith | Prosthetics |
| Sound | Mark DeSimone | ADR Mixer |
| Sound | Glenn Freemantle | Sound Designer |
| Costume & Make-Up | Tamsin Dorling | Makeup & Hair |
| Costume & Make-Up | Chris Lyons | Special Effects Makeup Artist |
| Costume & Make-Up | Paula Price | Makeup & Hair |
| Sound | Niv Adiri | Sound Effects Editor |
| Art | Gary Jopling | Art Direction |
| Sound | Ben Barker | Sound Effects Editor |
| Sound | Mike Dowson | Sound Re-Recording Mixer |
| Sound | Sandy Buchanan | ADR Recordist |
| Costume & Make-Up | Nathaniel De'Lineadeus | Special Effects Makeup Artist |
| Production | Michele Tandy | Finance |
| Sound | Kirsten Lane | Music Consultant |
| Crew | Russell Pawson | Visual Effects Editor |
| Sound | Hugo Adams | Foley Editor |
| Sound | Jack Stew | Foley Artist |
| Sound | Nina Hartstone | Dialogue Editor |
