Glass is a 2019 American psychological superhero thriller film written and directed by M. Night Shyamalan, who also produced with Jason Blum, Marc Bienstock, and Ashwin Rajan. The film is a crossover and sequel to Shyamalan's previous films Unbreakable (2000) and Split (2016) and the third and final installment in the Unbreakable trilogy a.k.a. Eastrail 177 Trilogy. Bruce Willis, Samuel L. Jackson, Spencer Treat Clark, and Charlayne Woodard reprise their Unbreakable roles, while James McAvoy and Anya Taylor-Joy return as their Split characters, with Sarah Paulson, Adam David Thompson, and Luke Kirby joining the cast.
Despite interest in a sequel, Touchstone Pictures opted not to finance one. Shyamalan set out to write Split using a character he had written for Unbreakable but pulled from its script due to balance issues. Shyamalan realized the opportunity he had to create a trilogy of works, and used the ending of Split to establish the film as within the Unbreakable narrative. This included securing the rights to use Willis's Unbreakable character from Walt Disney Studios, with the promise of including Disney within the production and distribution of this third film alongside Universal Pictures. Split was a financial and critical success, and by April 2017, Shyamalan announced that he started the production process for Glass.
The film had its world premiere at Alamo Drafthouse Cinema on January 12, 2019 and was released in the United States on January 18, 2019, by Universal Pictures. Glass received generally unfavorable reviews from critics, who found the film "disappointing" and "underwhelming". Nevertheless, the film was a financial success as it grossed $247 million worldwide against a $20 million production budget.