Hack! is a 2007 American horror film directed and written by Matt Flynn. The film centres on a group of students who, while on a field trip, become victims in a snuff film, and stars Danica McKellar, Jay Kenneth Johnson, William Forsythe, Sean Kanan, Juliet Landau, Justin Chon, Travis Schuldt, Adrienne Frantz and Gabrielle Richens. The film was released in the UK on July 20, 2007, before receiving a US release on December 11, 2007.

Danica Mae McKellar is an American actress, mathematics writer, and education advocate. She is best known for playing Winnie Cooper in the television series The Wonder Years.