When three college students move into an old house off campus, they unwittingly unleash a supernatural entity known as The Bye Bye Man, who comes to prey upon them once they discover his name. The friends must try to save each other, all the while keeping The Bye Bye Man's existence a secret to save others from the same deadly fate.
| Actor | Role |
|---|---|
 Douglas SmithElliot | Elliot |
 Lucien LaviscountJohn | John |
 Cressida BonasSasha | Sasha |
 Doug JonesThe Bye Bye Man | The Bye Bye Man |
 Michael TruccoVirgil | Virgil |
 Jenna KanellKim | Kim |
 Erica TremblayAlice | Alice |
 Marisa EcheverriaTrina | Trina |
 Cleo KingMrs. Watkins | Mrs. Watkins |
 Faye DunawayWidow Redmon | Widow Redmon |
 Carrie-Anne MossDet. Shaw | Det. Shaw |
 Leigh WhannellLarry Redmon | Larry Redmon |
 Keelin WoodellYoung Mrs. Redmon | Young Mrs. Redmon |
| LLara KnoxJane | Jane |
 Jonathan PennerMr. Daizy | Mr. Daizy |
 Nicholas SadlerProfessor Cooper | Professor Cooper |
 Martha HackettGiselle | Giselle |
 Ava PennerAnna | Anna |
 Andrew GorellRick | Rick |
| DDan AndersK-9 Police officer | K-9 Police officer |