Will is 38 maar gedraagt zich als een tiener. Hij is single, heeft geen kinderen en is nog steeds cool: hij rijdt in een snelle auto, gaat naar trendy clubs en weet welke sportschoenen je hoort te dragen. Hij heeft ook een perfecte manier gevonden om vrouwen te ontmoeten: hij gaat naar bijeenkomsten van alleenstaande ouders, waar veel vrouwen komen die een nieuwe leuke man zoeken, en doet alsof hij zelf ook een kind heeft. Via zo'n bijeenkomst ontmoet hij Marcus, de oudste twaalfjarige jongen ter wereld. Marcus is een beetje vreemd: hij luistert graag naar Joni Mitchell en Mozart, hij zorgt voor zijn moeder en hij heeft zelfs nog nooit sportschoenen gedragen. Langzaam ontstaat er een bijzondere vriendschap tussen de twee.
Nee, helaas is About a Boy nog niet beschikbaar op Netflix in Nederland.
| Production | Robert De Niro | Producer |
| Production | Brad Epstein | Producer |
| Camera | Remi Adefarasin | Director of Photography |
| Writing | Nick Hornby | Novel |
| Editing | Nick Moore | Editor |
| Production | Tim Bevan | Producer |
| Writing | Nick Hornby | Screenplay |
| Production | Priscilla John | Casting |
| Directing | Chris Weitz | Director |
| Writing | Chris Weitz | Screenplay |
| Writing | Paul Weitz | Screenplay |
| Production | Eric Fellner | Producer |
| Directing | Paul Weitz | Director |
| Art | Jim Clay | Production Design |
| Sound | Badly Drawn Boy | Original Music Composer |
| Writing | Peter Hedges | Screenplay |
| Production | Jane Rosenthal | Producer |
| Art | Bill Hargreaves | Props |
| Production | Nick Hornby | Executive Producer |
| Directing | Nikki Clapp | Script Supervisor |
| Camera | Peter Robertson | "A" Camera Operator |
| Camera | René Adefarasin | Camera Loader |
| Sound | Nick Angel | Music Supervisor |
| Production | Liza Chasin | Co-Producer |
| Production | Neil Chaplin | Production Accountant |
| Production | Ann Lynch | Production Coordinator |
| Costume & Make-Up | Graham Johnston | Makeup Designer |
| Crew | Graham Stumpf | Post Production Supervisor |
| Camera | John Arnold | Key Grip |
| Production | Nicky Kentish Barnes | Co-Producer |
| Costume & Make-Up | Graham Johnston | Hair Designer |
| Production | Bernard Bellew | Production Manager |
| Directing | Ben Howarth | Second Assistant Director |
| Production | Lynn Harris | Executive Producer |
| Production | Debra Hayward | Co-Producer |
| Production | Tarn Harper | Post Production Accountant |
| Art | Rod McLean | Supervising Art Director |
| Directing | Christopher Newman | First Assistant Director |
| Directing | Alex Oakley | Third Assistant Director |
| Camera | Peter Robertson | Steadicam Operator |
| Production | Hardy Justice | Co-Producer |
| Sound | Tony Dawe | Sound Mixer |
| Sound | Jaya Bishop | Boom Operator |
| Production | Steve Hart | Location Manager |
| Costume & Make-Up | Guy Speranza | Assistant Costume Designer |
| Crew | Joseph Alley | Carpenter |
| Lighting | Jamie Mills | Electrician |
| Editing | Simon Cozens | First Assistant Editor |
| Sound | Chris Carpenter | Sound Re-Recording Mixer |
| Editing | Theresa Repola Mohammed | Negative Cutter |
| Sound | Lee Gilmore | Apprentice Sound Editor |
| Crew | Jill McCullough | Dialogue Coach |
| Costume & Make-Up | Carmel Jackson | Makeup Artist |
| Art | John Bush | Set Decoration |
| Art | Jeff Sullivan | Painter |
| Sound | William Hooper | Sound Editor |
| Sound | Norval D. Crutcher III | ADR Editor |
| Sound | Andy Koyama | Sound Re-Recording Mixer |
| Art | Barry Gibbs | Property Master |
| Crew | Peter Duffy | Carpenter |
| Production | Meghan Lyvers | Producer's Assistant |
| Crew | Stacy Mann | Unit Publicist |
| Sound | Colin Cooper | ADR Recordist |
| Editing | Jim Passon | Color Timer |
| Sound | Patrick O'Sullivan | Sound Editor |
| Costume & Make-Up | Lorna McGowan | Makeup Artist |
| Costume & Make-Up | Martin Chitty | Costume Assistant |
| Costume & Make-Up | Claire Finlay-Thompson | Costume Supervisor |
| Sound | Gary S. Gerlich | Sound Editor |
| Crew | Nick Goodall | Carpenter |
| Sound | Marilyn Graf | Foley Editor |
| Sound | Ted Swanscott | ADR Mixer |
| Sound | Samuel Webb | Assistant Sound Editor |
| Sound | Charles Martin Inouye | Supervising Music Editor |
| Costume & Make-Up | Louise Egan | Costume Assistant |
| Crew | Darryl Carter | Carpenter |
| Art | Paul Duff | Standby Carpenter |
| Art | David Williamson | Standby Carpenter |
| Production | Brendan Donnison | ADR Voice Casting |
| Costume & Make-Up | Helen Mattocks | Key Set Costumer |
| Lighting | Dave Moss | Electrician |
| Sound | Bryan Pennington | Dolby Consultant |
| Sound | Richard LeGrand Jr. | Supervising Sound Editor |
| Sound | Walter Spencer | Dialogue Editor |
| Art | Gary Freeman | Art Direction |
| Camera | Laurie Sparham | Still Photographer |
| Sound | Stephen McLaughlin | Scoring Mixer |
| Art | Rosie Hardwick | Assistant Art Director |
| Crew | Sara Woodhatch | Actor's Assistant |
| Production | Lucy Williams | Unit Manager |
| Production | Laura Dickens | Casting Assistant |
| Sound | Bob McNabb | ADR Supervisor |
| Production | Vanessa Baker | ADR Voice Casting |
| Crew | Grahame Crowther | Stunt Coordinator |
| Sound | Bill Meadows | Sound Recordist |
| Costume & Make-Up | Joanna Johnston | Costume Design |
