Trying to rescue her home planet from destruction, a gorgeous extraterrestrial named Celeste arrives on Earth and begins her scientific research. She woos quirky scientist Dr. Steve Mills, a widower with a young daughter. Before long, Celeste finds herself in love with Steve and her new life on Earth, where she experiences true intimacy for the first time. But when she loses sight of her mission, she begins to question where she belongs.
Unfortunately the movie My Stepmother Is an Alien is not yet available on HBO Max.
| Directing | Richard Benjamin | Director |
| Camera | Richard H. Kline | Director of Photography |
| Production | Art Levinson | Executive Producer |
| Editing | Jacqueline Cambas | Editor |
| Production | Franklin R. Levy | Producer |
| Production | Ronald Parker | Producer |
| Production | Jerry Weintraub | Executive Producer |
| Production | Laurence Mark | Executive Producer |
| Directing | Dick Ziker | Second Unit Director |
| Crew | Dick Ziker | Stunt Coordinator |
| Crew | Dick Ziker | Stunts |
| Writing | Herschel Weingrod | Writer |
| Writing | Timothy Harris | Writer |
| Writing | Jonathan Reynolds | Writer |
| Costume & Make-Up | Rick Provenzano | Hairstylist |
| Costume & Make-Up | Brad Wilder | Makeup Artist |
| Costume & Make-Up | Daniel C. Striepeke | Makeup Artist |
| Costume & Make-Up | Kaori N. Turner | Makeup Artist |
| Costume & Make-Up | Aggie Guerard Rodgers | Costume Design |
| Costume & Make-Up | Christine Lee | Hairstylist |
| Art | Charles Rosen | Production Design |
| Sound | Larry Carow | Sound Editor |
| Sound | Donald J. Malouf | Sound Editor |
| Sound | Louis L. Edemann | Supervising Sound Editor |
| Crew | Ray Svedin | Special Effects |
| Writing | Jerico | Screenplay |
| Sound | Paul Timothy Carden | Sound Editor |
| Sound | Jerry Jost | Sound Mixer |
| Crew | Phil Cory | Special Effects |
| Sound | Richard C. Franklin | Sound Editor |
| Sound | Chuck Neely | Sound Editor |
| Sound | Nils C. Jensen | Sound Editor |
| Costume & Make-Up | Chuck Velasco | Costumer |
| Sound | Charles L. Campbell | Supervising Sound Editor |
| Art | Donald J. Remacle | Set Decoration |
| Visual Effects | John Dykstra | Visual Effects Supervisor |
| Crew | Ben Scott | Stunts |
| Crew | Chere Rae | Stunts |
| Crew | Danny Rogers | Stunts |
| Crew | Dianne L. Wilson | Stunts |
| Crew | Tracy Keehn-Dashnaw | Stunt Double |
| Sound | Alan Silvestri | Original Music Composer |
| Crew | Jeffrey J. Dashnaw | Stunts |
