George Roundy is a Beverly Hills hairstylist whose uncontrolled libido stands between him and his ambitions. He wants the security of a relationship. He wants to be a hairdressing "star" and open his own salon. But the fact that he beds down with the wife, daughter and mistress of a potential backer doesn't help. It also does little for his relationship with his current girlfriend.
You can now watch Shampoo online on the following streaming providers in the United States.
| Directing | Hal Ashby | Director |
| Writing | Warren Beatty | Writer |
| Writing | Robert Towne | Writer |
| Production | Warren Beatty | Producer |
| Editing | Robert C. Jones | Editor |
| Camera | László Kovács | Director of Photography |
| Costume & Make-Up | Kathryn Blondell | Hairstylist |
| Directing | Art Levinson | First Assistant Director |
| Art | W. Stewart Campbell | Art Direction |
| Art | George Gaines | Set Decoration |
| Production | Mike Fenton | Casting |
| Sound | Paul Simon | Original Music Composer |
| Costume & Make-Up | E. Thomas Case | Makeup Artist |
| Production | Jane Feinberg | Casting |
| Directing | Ron Wright | Second Assistant Director |
| Art | Richard Sylbert | Production Design |
| Production | Charles H. Maguire | Associate Producer |
| Costume & Make-Up | Anthea Sylbert | Costume Design |
| Production | Charles H. Maguire | Production Manager |
| Crew | Craig R. Baxley | Stunt Double |
| Sound | Robert Glass | Sound Re-Recording Mixer |
| Sound | Dan Wallin | Sound Re-Recording Mixer |
| Sound | Robert Knudson | Sound Re-Recording Mixer |
| Sound | Tom Overton | Production Sound Mixer |
| Sound | Frank E. Warner | Sound Editor |
| Crew | Mags Kavanaugh | Stunt Double |
| Crew | Jerry Brutsche | Stunts |
| Camera | Peter Sorel | Still Photographer |
| Lighting | Richmond L. Aguilar | Gaffer |
| Camera | Robert C. Thomas | Camera Operator |
| Directing | Meta Rebner | Continuity |
