| Release Date | 27 March 1973 |
| Tagline | What the Devil hath joined together let no man cut asunder. |
| Genre | Horror, Mystery, Thriller |
| Country | USA |
| Filming Locations | Alexander Hamilton Apartment Building - 36 Hamilton, Staten Island, New York City, New York, USA |
| Language | English, French |
| Sound Mix | Mono |
| Color | Black and White, Color |
| Film Type | Feature |
| Film Class | Psychological Thriller |
| Themes | Twins and Lookalikes, Sibling Relationships, Wolf in Sheep's Clothing, Haunted By the Past, Psychic Abilities |
| Tones | Biting, Chilly, Claustrophobic, Disturbing, Downbeat, Gloomy, Hallucinatory, Lurid, Menacing, Satirical, Visceral |
| Tags | Amateur Detective, Boyfriend, Detective, Evidence, Evil, Hospital, Journalist, Mental Institution, Murder, Neighbor, Operation, Psychopath, Reporter, Siamese Twins, Sibling, Sister, Twins, Witness |
Sisters (released in the UK as Blood Sisters) is a 1973 independent psychological thriller directed by Brian De Palma and starring Margot Kidder.