At a sizable public college, high-minded student Eddy is forced to room with the slovenly Stuart, but the pair strike up a surprising friendship. When attractive co-ed Alex is assigned to live with the two male students because of her gender-neutral name, a roundabout love triangle ensues. Eddy secretly yearns for Stuart, who wants Alex, but she prefers Eddy. The complex situation leads to sexual experimentation and strained relationships.
Unfortunately the movie Threesome is not yet available on HBO Max.
| Camera | Alexander Gruszynski | Director of Photography |
| Editing | William C. Carruth | Editor |
| Production | Brad Krevoy | Producer |
| Directing | Andrew Fleming | Director |
| Directing | Phil Robinson | Second Assistant Director |
| Crew | Ralph Sall | Executive Music Producer |
| Sound | Thomas Newman | Original Music Composer |
| Writing | Andrew Fleming | Writer |
| Costume & Make-Up | Deborah Everton | Costume Design |
| Sound | Bill Bernstein | Music Editor |
| Sound | Giovanni Di Simone | Sound Mixer |
| Production | David Stein | Associate Producer |
| Costume & Make-Up | Clare M. Corsick | Key Hair Stylist |
| Costume & Make-Up | Patty York | Key Makeup Artist |
| Crew | BJ Davis | Stunt Coordinator |
| Sound | David C. Eichhorn | Sound Effects Editor |
| Sound | Jeffrey Pollack | Music Consultant |
| Crew | George Gale | Post Production Supervisor |
| Sound | William C. Carruth | Supervising Sound Editor |
| Art | Ivo Cristante | Production Design |
| Art | Ken Larson | Art Direction |
| Art | Tim Colohan | Set Decoration |
| Camera | Bruce Alan Greene | Steadicam Operator |
| Production | Robyn Ray | Casting |
| Production | Ed Mitchell | Casting |
| Production | Tracie Graham-Rice | Unit Production Manager |
| Art | Eric London | Set Dresser |
| Camera | David Garden | Second Assistant Camera |
| Directing | Richard J. Levin | Second Assistant Director |
| Sound | Tom Caton | Boom Operator |
| Sound | Paul Vik Marshall | Boom Operator |
| Sound | James Battersby | Boom Operator |
| Costume & Make-Up | Sonya Ooten | Wardrobe Supervisor |
| Directing | Robert A. Neft | Second Second Assistant Director |
| Camera | Jacek Laskus | Director of Photography |
| Directing | Jack Breschard | First Assistant Director |
| Production | Mike Johnson | Extras Casting |
| Production | Jennifer Sloan | Casting Assistant |
| Directing | Jack S. Krevoy | Second Second Assistant Director |
| Directing | Matt Hinkley | First Assistant Director |
| Camera | Ray Milazzo | Second Assistant Camera |
| Art | Raymond Consign | Storyboard Artist |
| Directing | Robin Winter | Second Second Assistant Director |
| Sound | Mark Weingarten | Production Sound Mixer |
| Camera | Katherine M. Butler | First Assistant Camera |
| Directing | Kate Morrison | Script Supervisor |
| Art | Bill Staples | Set Decoration |
| Camera | Abe Perlstein | Still Photographer |
| Costume & Make-Up | Brenna Gibson | Costumer |
| Directing | Martin Kitrosser | Script Supervisor |
| Art | Tim Colohan | Art Direction |
| Camera | Chris Lombardi | First Assistant Camera |
| Sound | Ron Bedrosian | Foley Mixer |
| Costume & Make-Up | Eryn Krueger Mekash | Makeup & Hair Assistant |
| Sound | Lynn Bopeley | Boom Operator |
| Production | Dawn Thomas | Production Coordinator |
| Sound | Robert W. Glass Jr. | Sound Re-Recording Mixer |
| Sound | Bill Bell | Foley Supervisor |
| Sound | Tim Chilton | Foley Artist |
| Sound | Jill Schachne | Foley Artist |
| Sound | Richard D. Rogers | Sound Re-Recording Mixer |
| Costume & Make-Up | Cheryl Voss | Key Makeup Artist |
| Editing | Tom Dailey | Assistant Editor |
| Sound | Frank Fleming | Sound Recordist |
| Directing | BJ Davis | Second Unit Director |
| Production | Steven Stabler | Producer |
| Production | Cary Woods | Executive Producer |
| Production | Bradley Jenkel | Co-Producer |
| Production | Tracie Graham-Rice | Line Producer |
