Om zijn collegegeld te betalen, gaat de verlegen maar briljante Ben Campbell samen met een selecte groep topstudenten elk weekend naar Las Vegas. Het doel: hun kennis gebruiken om de uitkomsten van blackjack naar hun hand te zetten. Onder leiding van de onorthodoxe wiskundeprofessor en statistiekgenie Micky Rosa, kraken ze de code en verslaan ze de casino's keer op keer.
Nee, helaas is 21 nog niet beschikbaar op Netflix in Nederland.
| Directing | Robert Luketic | Director |
| Production | Dana Brunetti | Producer |
| Production | Michael De Luca | Producer |
| Writing | Peter Steinfeld | Screenplay |
| Writing | Allan Loeb | Screenplay |
| Writing | Ben Mezrich | Novel |
| Production | William S. Beasley | Executive Producer |
| Production | Brett Ratner | Executive Producer |
| Production | Ryan Kavanaugh | Executive Producer |
| Camera | Russell Carpenter | Director of Photography |
| Art | Missy Stewart | Production Design |
| Editing | Elliot Graham | Editor |
| Costume & Make-Up | Luca Mosca | Costume Design |
| Production | Francine Maisler | Casting |
| Art | James F. Truesdale | Art Direction |
| Sound | Wade Wilson | Sound Effects Editor |
| Crew | John Ruggieri | Special Effects Coordinator |
| Visual Effects | Gray Marshall | Visual Effects Supervisor |
| Crew | Freddie Hice | Stunt Coordinator |
| Sound | Carlton Kaller | Music Editor |
| Sound | Laura Harris Atkinson | Dialogue Editor |
| Sound | David Sardy | Original Music Composer |
| Production | Bryan Thomas | Unit Production Manager |
| Production | William S. Beasley | Unit Production Manager |
| Directing | Justin Muller | First Assistant Director |
| Directing | John M. Morse | Second Assistant Director |
| Production | Sharyn Shimada-Huggins | Production Supervisor |
| Art | Tracey A. Doyle | Set Decoration |
| Art | David Gulick | Property Master |
| Directing | Wilma Garscadden-Gahret | Script Supervisor |
| Camera | David E. Diano | "A" Camera Operator |
| Camera | Will Arnot | "B" Camera Operator |
| Camera | Will Arnot | Steadicam Operator |
| Camera | Erik L. Brown | First Assistant "A" Camera |
| Camera | Patrick Quinn | First Assistant "B" Camera |
| Camera | Eric Swanek | First Assistant "B" Camera |
| Costume & Make-Up | Andrew Poleszak | Assistant Costume Designer |
| Costume & Make-Up | Caroline Errington | Costume Supervisor |
| Costume & Make-Up | Taryn Walsh | Key Costumer |
| Costume & Make-Up | Laurie Bramhall | Costumer |
| Costume & Make-Up | Parrish Kennington | Costumer |
| Costume & Make-Up | Vanessa Knoll | Costumer |
| Costume & Make-Up | Johanna Argan | Costumer |
| Costume & Make-Up | Tania McComas | Makeup Department Head |
| Costume & Make-Up | Trish Seeney | Key Makeup Artist |
| Costume & Make-Up | Marleen Alter | Makeup Artist |
| Costume & Make-Up | Lucia Mace | Hair Department Head |
| Costume & Make-Up | Elizabeth Cecchini | Key Hair Stylist |
| Lighting | Len Levine | Gaffer |
| Lighting | Carlos Bermudez | Best Boy Electric |
| Lighting | Scott D. Davis | Rigging Gaffer |
| Camera | Philip Sloan | Key Grip |
| Camera | Tony Campenni | Dolly Grip |
| Camera | Thomas Doran | Dolly Grip |
| Sound | Nelson Stoll | Production Sound Mixer |
| Sound | Brian Copenhagen | Boom Operator |
| Crew | Bryce Shields | Video Assist Operator |
| Production | Charles Harrington | Location Manager |
| Production | Mark Fitzgerald | Assistant Location Manager |
| Production | Shari LaFranchi Blakney | Production Coordinator |
| Production | Luke Poling | Assistant Production Coordinator |
| Production | Anne C. Ford | Production Accountant |
| Art | Joseph Kearney | Construction Coordinator |
| Art | Theodore Suchecki | Construction Foreman |
| Art | E. David Cosier | Set Designer |
| Art | Mick Cukurs | Set Designer |
| Art | George Lee | Set Designer |
| Art | Eric Bryant | Assistant Art Director |
| Art | Janine Moore | Art Department Coordinator |
| Art | Paul Richards | Leadman |
| Art | Jennifer Gerbino | Assistant Property Master |
| Art | Mark Vena | Storyboard Artist |
| Art | Mick Reinman | Storyboard Artist |
| Crew | Cid Swank | Unit Publicist |
| Camera | Peter Iovino | Still Photographer |
| Directing | Scott Rorie | Second Second Assistant Director |
| Production | Elizabeth Chodar | Casting Assistant |
| Crew | Tracy R. Spiegel | Craft Service |
| Editing | Liza D. Espinas | First Assistant Editor |
| Editing | Mark Hartzell | Assistant Editor |
| Sound | Michael D. Wilhoit | Supervising Sound Editor |
| Sound | Bob Bowman | Assistant Sound Editor |
| Sound | Scott Wolf | Sound Designer |
| Sound | Mark Gordon | Dialogue Editor |
| Sound | Bob Newlan | Dialogue Editor |
| Sound | Jessica Gallavan | ADR Editor |
| Sound | Kerry Ann Carmean | Foley Editor |
| Sound | Gary A. Hecker | Foley Artist |
| Sound | Michael J. Broomberg | Foley Artist |
| Sound | Brad Brock | Foley Mixer |
| Sound | Howard London | ADR Mixer |
| Sound | David Sardy | Music Supervisor |
| Editing | Mo Henry | Negative Cutter |
| Editing | Stephen Nakamura | Digital Colorist |
| Sound | Gary C. Bourgeois | Sound Re-Recording Mixer |
| Sound | Greg Orloff | Sound Re-Recording Mixer |
| Visual Effects | Ashley Clark | Visual Effects Producer |
| Crew | Jeffrey J. Dashnaw | Stunts |
| Crew | Susan Garfield | Stand In |
| Crew | Billy D. Lucas | Stunts |
| Crew | Mic Rodgers | Stunts |
| Crew | Danny Wynands | Stunts |
| Crew | Casey O'Neill | Stunt Double |
