Anne Hathaway, Thomasin McKenzie, Shea Whigham, and Marin Ireland at Premiere of Psychological Thriller Eileen at Sundance Film

Based on the novel of the same name by Ottessa Moshfegh, Eileen screened in the Premieres section on Saturday at the Sundance Film Festival.

The psychological thriller stars Anne Hathaway, Thomasin McKenzie, Shea Whigham, Marin Ireland, and Owen Teague.

Set in the 1960s, it follows a 20-something Eileen (Thomasin McKenzie), a strange young woman who leads a dreary life working as a secretary at a boy's prison in Massachusetts, then goes home to her cruel, alcoholic father (Shea Whigham).

When Rebecca Saint John (Anne Hathaway) joins the prison staff as the new psychologist, Eileen becomes her confidante.

But their friendship entangles her in a crime that alters her life.

The cast of acting heavyweights gave us a look inside the film at the red carpet premiere.