The Lost Boys is a 1987 American horror film directed by Joel Schumacher, blending teenage adventure, dark humor, and vampire horror. Set in the fictional California beach town of Santa Carla, it became a cult favorite and is particularly remembered for its stylish late-1980s atmosphere, soundtrack, and cast.

“Cry Little Sister” was written and performed by Gerard McMann (later known as Gerard McMahan) specifically for the film. Its haunting, dramatic sound—especially the recurring “thou shall not” refrain—became closely associated with The Lost Boys and helped establish the movie’s dark, gothic identity.

- Film: The Lost Boys
- Release: 1987
- Director: Joel Schumacher
- Song: “Cry Little Sister”
- Artist: Gerard McMann / Gerard McMahan
- Genre: Gothic rock / dark pop
- Setting: Santa Carla, California
- Notable cast: Jason Patric, Corey Haim, Corey Feldman, Kiefer Sutherland, Dianne Wiest, and Jamie Gertz
- Interesting fact: The song has continued to appear in later Lost Boys releases and adaptations, helping make it one of the film’s most recognizable musical signatures.

“Cry Little Sister” remains one of those songs that feels inseparable from the world of The Lost Boys.