They Know
American film
From Wikipedia, the free encyclopedia
They Know is an upcoming American psychological horror film written, directed by, and starring Bill Hader. The film is based on an original story by Hader and Barry writer Duffy Boudreau.[1] This film marks Hader's feature directorial debut.
Duffy Boudreau
- Bill Hader
- Robert Graf
- Alyssa Donovan
| They Know | |
|---|---|
| Directed by | Bill Hader |
| Screenplay by | Bill Hader |
| Story by | Bill Hader Duffy Boudreau |
| Produced by |
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| Starring |
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Production companies | |
| Country | United States |
| Language | English |
Premise
A divorced father (Hader) grows suspicious that a mysterious man dating his ex-wife (Cardellini) is having a strange influence on their daughters (Lang and Mote).[1][2]
Cast
- Bill Hader
- Linda Cardellini
- Lilou Lang
- Lorelei Olivia Mote
Background
The film is based on an original story that Hader had conceived with longtime collaborator Duffy Boudreau.[3] Hader initially wrote the script, described by Ari Aster as being "incredibly personal",[4] after wrapping the final season of Barry. Hader struggled to find financing due to the "disturbing" and "cynical" nature of the script, and briefly shelved the project.[5] He revealed that he was inspired to return to the project after watching Aster's 2025 film Eddington.[5]
Production
The film is being financed by MRC.[1] Hader and Robert Graf will serve as producers under the formers "Hanarply" banner, with Alyssa Donovan serving as co-producer.[1]
Production began in Los Angeles on April 13, 2026, where it was announced that Linda Cardellini would be joining the cast as the protagonist's ex-wife.[6] On April 28, 2026, Lilou Lang and Lorelei Olivia Mote were announced to be joining the cast, playing the daughters of protagonist.[2] On June 9, 2026, Cardellini revealed that the film had wrapped principal photography.[7]