A film featuring sisters who speak in unison has premiered. The story follows fictional characters Jean and Joan Holbrooke. Rooney and Kate Mara play the sisters in the movie.

The idea for the film came from a real-life encounter with twins who spoke in unison. This encounter happened 45 years ago and involved twins who became known for dressing alike and a stalking case.

Further details about the film, including its production, are available from the source. The film is a complete invention, not based on real events, despite being inspired by them.