A stunt performer is suing Kevin Costner, saying she was compelled to perform in an unscripted rape scene in a film he was directing that broke Hollywood production rules and left her traumatized.

In a complaint filed Tuesday, Devyn LaBella claims that union and contractual rules were breached when she was allegedly subjected to perform an impromptu scene of sexual violence without an intimacy coordinator.

A stunt double said she was left with trauma by an unscripted scene that did not include an intimacy coordinator. Mr. Costner’s lawyer said the claims were meritless.