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 |
| Editing | Jacqueline Cambas | Editor |
| Production | Art Levinson | Executive Producer |
| 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 | Stunts |
| Crew | Dick Ziker | Stunt Coordinator |
| Writing | Herschel Weingrod | Writer |
| Writing | Timothy Harris | Writer |
| Writing | Jonathan Reynolds | Writer |
| Art | Charles Rosen | Production Design |
| Costume & Make-Up | Aggie Guerard Rodgers | Costume Design |
| Costume & Make-Up | Christine Lee | Hairstylist |
| Costume & Make-Up | Rick Provenzano | Hairstylist |
| Costume & Make-Up | Daniel C. Striepeke | Makeup Artist |
| Costume & Make-Up | Kaori N. Turner | Makeup Artist |
| Costume & Make-Up | Brad Wilder | Makeup Artist |
| Sound | Paul Timothy Carden | Sound Editor |
| Sound | Larry Carow | Sound Editor |
| Sound | Louis L. Edemann | Supervising Sound Editor |
| Sound | Richard C. Franklin | Sound Editor |
| Sound | Nils C. Jensen | Sound Editor |
| Sound | Jerry Jost | Sound Mixer |
| Sound | Donald J. Malouf | Sound Editor |
| Sound | Chuck Neely | Sound Editor |
| Crew | Phil Cory | Special Effects |
| Crew | Ray Svedin | Special Effects |
| Writing | Jerico | Screenplay |
| Costume & Make-Up | Chuck Velasco | Costumer |
| Art | Donald J. Remacle | Set Decoration |
| Sound | Charles L. Campbell | Supervising Sound Editor |
| Visual Effects | John Dykstra | Visual Effects Supervisor |
| Crew | Chere Rae | Stunts |
| Crew | Danny Rogers | Stunts |
| Crew | Ben Scott | Stunts |
| Crew | Dianne L. Wilson | Stunts |
| Crew | Tracy Keehn-Dashnaw | Stunt Double |
| Sound | Alan Silvestri | Original Music Composer |
| Crew | Jeffrey J. Dashnaw | Stunts |
