Iris invites her friend Jack to stay at her family's island getaway after the death of his brother. At their remote cabin, Jack's drunken encounter with Hannah, Iris' sister, kicks off a revealing stretch of days.
You can now watch Your Sister's Sister online on the following streaming providers in the United States.
| Directing | Lynn Shelton | Director |
| Writing | Lynn Shelton | Writer |
| Camera | Benjamin Kasulke | Director of Photography |
| Production | Steven Schardt | Producer |
| Editing | Nat Sanders | Editor |
| Art | John Lavin | Production Design |
| Sound | Vinny Smith | Original Music Composer |
| Crew | Emily Blunt | Creative Consultant |
| Production | Kate Bayley | Associate Producer |
| Production | Mark Duplass | Executive Producer |
| Production | Mel Eslyn | Co-Producer |
| Production | Dashiell Gantner | Executive Producer |
| Production | Vallejo Gantner | Executive Producer |
| Production | Megan Griffiths | Co-Producer |
| Production | Jennifer Maas | Associate Producer |
| Production | Dave Nakayama | Co-Executive Producer |
| Production | Lance Rosen | Co-Executive Producer |
| Production | Lynn Shelton | Executive Producer |
| Production | Jennifer Roth | Executive Producer |
| Costume & Make-Up | Petra Kjorsvik | Makeup & Hair |
| Crew | Mel Eslyn | Post Production Supervisor |
| Production | Jennifer Roth | Unit Production Manager |
| Directing | Jennifer Roth | First Assistant Director |
| Directing | Susan LaSalle | Second Assistant Director |
