Actress in demand Sarah Paulson will be joining M. Night Shyamalan's Glass. It's difficult to talk about the director's next project without revealing some mighty spoilers. So...SPOILER ALERT.

The master of twist's new film is actually a quasi sequel to his subversive 2000 superhero origin film Unbreakable. It also take places in the same universe as his last film Split , in which Bruce Willis's David Dunn made a surprise appearance in the third act.

In a tweet, Shyamalan revealed Paulson's involvement but it isn't yet clear what part she is set to play. Paulson responded to his tweet, expressing her excitement to work with him:

Incredibly fortunate to round out our iconic cast of actors on #Glass... @MsSarahPaulson will be joining us. #powerhouse

— M. Night Shyamalan (@MNightShyamalan) July 24, 2017

Glass will be a blend of both Split and Unbreakable, with James McAvoy's killer with multiple personalities also set to appear. Willis's almost invincible hero will face off against the crazed criminal mastermind 'Mr. Glass' who will once again by played by Samuel L. Jackson.