Fact: Alana Haim is co-starring with Cooper Hoffman in Paul Thomas Anderson's next film.

After on-set photos leaked last week from Paul Thomas Anderson's untitled 1970s-set coming-of-age story, it's now been officially announced that Alana Haim is co-starring in the film with Phillip Seymour Hoffman's son, Cooper Hoffman.

According to The Hollywood Reporter, the film is set in the San Fernando Valley, and will also feature Bradley Cooper and Bennie Safdie.

THR reports that: "Hoffman is playing the child actor at the center of the movie, which involves multiple storylines and is set in the San Fernando Valley. While the project will feature an ensemble of actors, including Bradley Cooper, Hoffman is the star of the film, with singer-songwriter Alana Haim."

Alana's acting debut follows Anderson directing music videos for Haim and their live 'Valentine' short-film (which you can watch below).