Brennan Huff and Dale Doback might be grown men. But that doesn't stop them from living at home and turning into jealous, competitive stepbrothers when their single parents marry. Brennan's constant competition with Dale strains his mom's marriage to Dale's dad, leaving everyone to wonder whether they'll ever see eye to eye.
You can now watch Step Brothers online on the following streaming providers in the United States.
| Sound | Jon Brion | Original Music Composer |
| Writing | John C. Reilly | Story |
| Crew | Bruce Minkus | Special Effects Coordinator |
| Sound | Vincent Guisetti | Foley Artist |
| Art | James E. Tocci | Set Designer |
| Camera | Oliver Wood | Director of Photography |
| Sound | George H. Anderson | Supervising Sound Editor |
| Camera | Terry Wolcott | Second Assistant "A" Camera |
| Writing | Will Ferrell | Screenplay |
| Production | Will Ferrell | Executive Producer |
| Writing | Will Ferrell | Story |
| Art | Virginia Randolph-Weaver | Art Direction |
| Camera | Michael St. Hilaire | "B" Camera Operator |
| Costume & Make-Up | Susan Matheson | Costume Design |
| Production | Judd Apatow | Producer |
| Editing | Brent White | Editor |
| Production | Allison Jones | Casting |
| Art | Clayton R. Hartley | Production Design |
| Writing | Adam McKay | Screenplay |
| Directing | Adam McKay | Director |
| Production | Adam McKay | Executive Producer |
| Writing | Adam McKay | Story |
| Production | David B. Householter | Executive Producer |
| Production | Jimmy Miller | Producer |
| Crew | Rosine 'Ace' Hatem | Stunts |
| Sound | Kevin Kaska | Orchestrator |
| Costume & Make-Up | Steve Artmont | Makeup Department Head |
| Production | Basil Grillo | Unit Production Manager |
| Directing | Matt Rebenkoff | First Assistant Director |
| Sound | Art Rochester | Production Sound Mixer |
| Production | Jessica Elbaum | Associate Producer |
| Art | Casey Hallenbeck | Set Decoration |
| Production | Andrew Epstein | Associate Producer |
| Sound | Cindy Marty | Sound Effects Editor |
| Art | Scott Maginnis | Property Master |
| Costume & Make-Up | Bridget Cook | Hair Department Head |
| Production | Josh Church | Co-Producer |
| Editing | Michael Hofacre | Assistant Editor |
| Sound | James Matheny | Dialogue Editor |
| Costume & Make-Up | Charlene Amateau | Costume Supervisor |
| Sound | Randall L. Johnson | Boom Operator |
| Sound | Larry Kemp | Dialogue Editor |
| Camera | Joe Chess | "A" Camera Operator |
| Crew | Paul Murphey | Video Assist Operator |
| Sound | Pamela Kahn | Foley Artist |
| Costume & Make-Up | Yvonne Bastidos | Costumer |
| Crew | Michael Menapace | Transportation Captain |
| Sound | Hal Willner | Music Supervisor |
| Production | Kathryn Mindala | Production Accountant |
| Crew | Will Casey | Unit Publicist |
| Costume & Make-Up | Susan Strubel | Costumer |
| Sound | Kyle Rochlin | Foley Mixer |
| Sound | Howard London | ADR Mixer |
| Art | Butch West | Construction Coordinator |
| Crew | Eddie Braun | Stunts |
| Camera | Les T. Tomita | Key Grip |
| Directing | Cate Hardman | Script Supervisor |
| Editing | Melissa Bretherton | Additional Editor |
| Camera | Gemma La Mana | Still Photographer |
| Camera | Maricella Ramirez | First Assistant "A" Camera |
| Costume & Make-Up | Michael A. Russell | Key Costumer |
| Camera | Annika Iltis | Camera Loader |
| Camera | Timothy James Kane | First Assistant "B" Camera |
| Sound | Tammy Fearing | Supervising ADR Editor |
| Sound | Joe Schiff | Sound Effects Editor |
| Costume & Make-Up | Simone Almekias-Siegl | Key Makeup Artist |
| Crew | James D. D'Amico | Transportation Co-Captain |
| Directing | Courtenay Miles | Second Assistant Director |
| Camera | Michael D. Alvarez | Second Assistant "B" Camera |
| Lighting | James B. Crawford | Chief Lighting Technician |
| Crew | Joni Avery | Stunts |
| Costume & Make-Up | Nanci Cascio | Key Hair Stylist |
| Editing | Mo Henry | Negative Cutter |
| Art | Mark Sakamoto | Leadman |
| Art | Brook Mansbridge | Construction Foreman |
| Camera | Michael T. Travers | Best Boy Grip |
| Production | Gerard Averill | Location Manager |
| Editing | John Persichetti | Digital Colorist |
| Art | Glenn Forbes | Assistant Property Master |
| Crew | Sonia Izzolena | Stunts |
