D'Artagnan, on a quest to rescue the abducted Constance, runs into the mysterious Milady de Winter again. The tension between the Catholics and the Protestants finally escalates, as the king declares war — forcing the now four musketeers into battle. But as the war goes on, they are tested physically, mentally and emotionally.
| Directing | Martin Bourboulon | Director |
| Production | Dimitri Rassam | Producer |
| Writing | Alexandre de La Patellière | Writer |
| Writing | Matthieu Delaporte | Writer |
| Production | Cédric Iland | Co-Producer |
| Production | Matthieu Prada | Executive Producer |
| Production | Ignacio Segura | Co-Producer |
| Production | Bastien Sirodot | Co-Producer |
| Sound | Guillaume Roussel | Music |
| Camera | Nicolas Bolduc | Director of Photography |
| Editing | Stan Collet | Editor |
| Production | Elodie Demey | Casting Director |
| Art | Stéphane Taillasson | Production Design |
| Art | Patrick Schmitt | Supervising Art Director |
| Art | Emmanuel Delis | Set Decoration |
| Costume & Make-Up | Thierry Delettre | Costume Design |
| Costume & Make-Up | Alexandra Becquet | Additional Hairstylist |
| Costume & Make-Up | Laura Bernard | Makeup Artist |
| Costume & Make-Up | Aurore Bougouin | Makeup Artist |
| Costume & Make-Up | Roxane Bruneton | Hairstylist |
| Costume & Make-Up | Marion Chevance | Makeup Artist |
| Costume & Make-Up | Sophie Dauchez | Additional Hairstylist |
| Costume & Make-Up | Bénédicte De Lataillade | Makeup Artist |
| Costume & Make-Up | Thibault Debleds | Additional Hairstylist |
| Costume & Make-Up | Marthe Faucouit | Makeup Artist |
| Costume & Make-Up | Justine Fiorito | Makeup Artist |
| Costume & Make-Up | Anthony Jagu | Hairstylist |
| Costume & Make-Up | Margherita Laserpe | Makeup Artist |
| Costume & Make-Up | Jennifer Levacher | Hairstylist |
| Costume & Make-Up | Frédérique Ney | Makeup Designer |
| Costume & Make-Up | Karine Palazzi | Key Makeup Artist |
| Costume & Make-Up | Stéphane Robert | Key Makeup Artist |
| Costume & Make-Up | Kerry Skelton | Makeup Artist |
| Costume & Make-Up | Marie-France Thibault | Additional Hairstylist |
| Costume & Make-Up | Lucrèce Touret | Additional Hairstylist |
| Costume & Make-Up | Chloé Van Lierde | Assistant Makeup Artist |
| Costume & Make-Up | Caroline Vlieghe | Makeup Artist |
| Production | Sarah Blanc | Production Coordinator |
| Crew | Nicolas Bonnet | Post-Production Manager |
| Production | Romane Boogaerts | Assistant Accountant |
| Production | Isabelle d’Olce | Administration |
| Production | Coline Hieronimus | Production Assistant |
| Production | Valentine Kervagoret | Production Supervisor |
| Production | Olivier Meunier | Assistant Accountant |
| Production | Camille Nahassia | Production Coordinator |
| Production | Guinal Riou | Production Manager |
| Production | Hayyah Setton | Administration |
| Production | Svetlane Vaesken | Controller |
| Directing | Meryll Adjedj | Second Assistant Director |
| Directing | Carole Amen | First Assistant Director |
| Directing | David Biet | Second Assistant Director |
| Directing | Zoé Chadeau | Assistant Director |
| Directing | Juliette Crété | First Assistant Director |
| Directing | Julien Dara | Third Assistant Director |
| Directing | Neige de la Patellière | Assistant Director Trainee |
| Directing | Mathis Dujardin | Assistant Director |
| Directing | Gabriella Farah | Third Assistant Director |
| Directing | Louis Giacobetti | Second Assistant Director |
| Directing | Sonia Mandelbaum | Assistant Director |
| Directing | Melvin Nkosi | Third Assistant Director |
| Directing | Turina Sausse | Third Assistant Director |
| Directing | Emmanuelle Tan | Third Assistant Director |
| Art | Édouard Blaise | Property Master |
| Art | Alexis Brami | Second Assistant Art Director |
| Art | Mathias Canard | Set Dresser |
| Art | Clémentine Carrasco | Assistant Art Director |
| Art | Luca Crepelle | Set Decoration Buyer |
| Art | Jonathan Delerue | Storyboard Artist |
| Art | Omid Gharakhanian | Construction Buyer |
| Art | Clémence Hamel | Assistant Set Decoration |
| Crew | Yannick Heuveline | Carpenter |
| Crew | Stéphane Linet | Armorer |
| Art | Etienne Mercier | Property Master |
| Art | Samir Moundy | Swing |
| Art | Alexis Pont | Assistant Property Master |
| Art | Mark Schons | Concept Artist |
| Art | Barthelemy Thomas | Set Dresser |
| Art | Elisa Tulli | Assistant Art Director |
| Sound | Pierre Bezard | Boom Operator |
| Sound | Thibaut Demoor | Boom Operator |
| Sound | Clément Lemariey | Boom Operator |
| Sound | David Rit | Sound |
| Sound | Malo Thouément | Boom Operator |
| Sound | Emmanuel Ughetto | Boom Operator |
| Visual Effects | Jean-Christophe Magnaud | Special Effects Supervisor |
| Crew | Olivier Nguyen | Special Effects |
| Crew | Flora Zenenski | Special Effects Assistant |
| Visual Effects | Olivier Cauwet | Visual Effects Supervisor |
| Crew | Tony Augé | Stunts |
| Crew | Dimitri Besicovitch | Stunts |
| Crew | Gaëtan Caillot | Stunts |
| Crew | Quentin D'Hainaut | Stunts |
| Crew | Cedric Chavin | Stunt Double |
| Crew | Laurent Coin | Stunts |
| Crew | Marc David | Stunts |
| Crew | Andy Deschamps | Stunts |
| Crew | Jean Eudes Drouvin | Stunts |
| Crew | Gauthier Dussol | Stunts |
| Crew | Dominique Fouassier | Stunt Coordinator |
| Crew | Sébastien Fouassier | Stunts |
| Crew | Steven Janic | Stunts |
| Crew | Yang Mamath | Stunts |
| Crew | Audrey Meschi | Stunts |
| Crew | Alexandre Moreira | Stunt Double |
| Crew | Chloé Pages | Stunt Double |
| Crew | Estelle Piget | Stunt Double |
| Crew | Axel Sarrazin | Stunts |
| Crew | Alexandre Yde | Stunts |
| Crew | Richard Zannini | Stunts |
| Camera | Eric Bialas | "B" Camera Operator |
| Camera | Fabrice Bismuth | First Assistant "A" Camera |
| Lighting | Brice Bourdet | Rigging Grip |
| Lighting | Damien Bret | Electrician |
| Camera | Melina Brioude | Second Assistant "A" Camera |
| Lighting | Thibault Bru | Electrician |
| Crew | Clara Chanu | Video Assist Operator |
| Lighting | Sébastien Combe | Lighting Programmer |
| Lighting | William Dumont | Electrician |
| Crew | Jorge Escribens | Drone Operator |
| Crew | Elin Fischer | Video Assist Operator |
| Lighting | Mathilde Fouant | Lighting Technician |
| Lighting | Vincent Garat | Electrician |
| Camera | Guillaume Genini | First Assistant Camera |
| Camera | Guillaume Genini | Focus Puller |
| Lighting | Eric Gies | Gaffer |
| Camera | Benjamin Lavayssière | Drone Pilot |
| Lighting | Jean-Bernard Lortie | Electrician |
| Camera | Thibault Marsan-Bacheré | Steadicam Operator |
| Camera | Strasser Matteo | Grip |
| Camera | Matteo Nira Mancini | Grip |
| Camera | Amandine Nolin | Second Assistant "B" Camera |
| Production | Sarah Okendo | Data Management Technician |
| Camera | Julien Panié | Still Photographer |
| Camera | Guillaume Quilichini | Camera Operator |
| Lighting | Marc Rossero | Lighting Technician |
| Lighting | Pascal Rossignol | Rigging Grip |
| Camera | Laurent Schepman | Best Boy Grip |
| Camera | Pablo Sotes | Drone Pilot |
| Camera | Michel Strasser | Key Grip |
| Lighting | Benjamin Tessier | Electrician |
| Crew | Nicolas Thévenin | Video Assist Operator |
| Camera | Brice Tholozan | Drone Pilot |
| Camera | Olivier Thual | Dolly Grip |
| Camera | Maryline Touret | First Assistant "B" Camera |
| Camera | Anna-Katia Vincent | Additional First Assistant Camera |
| Camera | François-Xavier Walter | Grip |
| Production | Estelle Brision | Extras Casting Assistant |
| Production | Clément Noblecourt | Extras Casting |
| Production | Manon Poudoulec | Extras Casting |
| Costume & Make-Up | Marine Dubol | Seamstress |
| Costume & Make-Up | Diane Dussaud | Wardrobe Supervisor |
| Costume & Make-Up | Nil Farrell | Wardrobe Assistant |
| Costume & Make-Up | Bruce Lignerat | Costumer |
| Costume & Make-Up | Tara Mahé | Wardrobe Coordinator |
| Costume & Make-Up | Léa Peixoto | Costume Assistant |
| Editing | Léa Audouin | Dailies Operator |
| Editing | Mickaël Commereuc | Colorist |
| Production | Jean-Louis Guichaoua | Post Production Coordinator |
| Editing | Théodore Julia | Dailies Operator |
| Editing | Emmanuel Le Ridant | Colorist |
| Production | Pierre Madrolles | Post Production Coordinator |
| Editing | Fabien Pascal | Colorist |
| Production | Jean Bolzinger | Assistant Location Manager |
| Production | Hugo Froideval | Assistant Location Manager |
| Production | Baptiste Jourdan | Assistant Location Manager |
| Production | Anton Migoya | Assistant Location Manager |
| Production | Lora Quelennec | Assistant Location Manager |
| Art | Benjamin Vasseur | Location Scout |
| Art | Kalinka Weiler | Location Scout |
| Production | Robin Welch | Location Manager |
| Sound | Raphaëlle Dannus | Music Producer |
| Sound | Raphaëlle Dannus | Music Supervisor |
| Sound | Pierre-Marie Dru | Music Producer |
| Sound | Pierre-Marie Dru | Music Supervisor |
| Crew | Amandine Derdoukh | Assistant Script |
| Directing | Marie Gennesseaux | Script Supervisor |
| Crew | Julie Robert | Assistant Script |
| Production | Romane Boogaerts | Production Assistant |
| Art | Gauthier Ravily | Location Scout |
| Production | Loraine Roche-Tanguy | Production Coordinator |
| Costume & Make-Up | Avril Carpentier | Hairstylist |
| Camera | Elliott Carrasco | Drone Cinematographer |
| Writing | Alexandre Dumas | Novel |
