Actress Madisen Beaty (The Curious Case of Benjamin Button) has joined the cast of the Untitled Paul Thomas Anderson Project.

It isn't known what role Madisen Beaty will play, although there is speculation that she will portray the daughter of Philip Seymour Hoffman's character, The Master. We reported last week that Rami Malek is cast as The Master's son-in-law, who marries his 19-year-old daughter. However, Madisen Beaty is only 16 years old, so it's possible she may be up for a different role.

Paul Thomas Anderson will direct the project from his own original screenplay. The story, which is loosely based on the founding of Scientology, follows Philip Seymour Hoffman's The Master as he starts his own religious belief structure after World War II, which rapidly rises in popularity.

It still isn't known when production on the Untitled Paul Thomas Anderson Project will begin.