Sultry college dropout Annie Burroughs moves in with her older sister Marsha and proceeds to break up the relationship between Marsha and her live-in boyfriend David Mitchell so Annie can begin a sensuous love affair and have David all for herself.
Unfortunately the movie Baby Sister is not yet available on HBO Max.
| Directing | Steven Hilliard Stern | Director |
| Writing | Jo Lynne Michael | Writer |
| Writing | Paul Haggard Jr. | Writer |
| Writing | Susan Title | Writer |
| Production | Frank von Zerneck | Executive Producer |
| Sound | Fred Karlin | Original Music Composer |
| Camera | Isidore Mankofsky | Director of Photography |
| Crew | Jon H. Epstein | Stunts |
| Editing | Mike Hill | Editor |
| Editing | Gregory Prange | Editor |
| Art | Norm Baron | Production Design |
| Art | Ethel Robins Richards | Set Decoration |
| Costume & Make-Up | Les Berns | Makeup Artist |
| Costume & Make-Up | Georgina Williams | Hairstylist |
| Editing | Carol Ann Jackson | Assistant Editor |
| Production | Robert M. Sertner | Associate Producer |
| Production | William Beaudine Jr. | Production Manager |
| Directing | Ray Marsh | First Assistant Director |
| Directing | Craig Beaudine | Second Assistant Director |
| Directing | Debra Michaelson | Second Assistant Director |
| Costume & Make-Up | Shari Feldman | Wardrobe Master |
| Costume & Make-Up | Ervin W. Rose | Wardrobe Master |
| Art | Ted Mossman | Property Master |
| Directing | Jane Hampton | Script Supervisor |
| Production | Marilyn Berro | Producer's Assistant |
| Production | Susan Weber-Gold | Production Coordinator |
| Crew | Judy Bauer | Production Controller |
| Production | Lois B. Samuels | Production Secretary |
| Sound | Terri Fricon | Music Supervisor |
| Crew | Dale Henry | Transportation Captain |
| Production | Phillips 'Flip' Wylly Jr. | Location Manager |
| Crew | Mick McAfee | Post Production Supervisor |
| Sound | Barry Thomas | Sound |
| Editing | Thomas Jarvis | Assistant Editor |
| Sound | Rich Harrison | Sound Effects |
| Sound | John Mick | Music Editor |
| Editing | Susanne Gervay | Negative Cutter |
| Production | William Beaudine Jr. | Executive In Charge Of Production |
