Old is a 2021 American thriller film written, directed, and produced by M. Night Shyamalan, inspired by the Swiss graphic novel Sandcastle by Pierre Oscar Levy and Frederik Peeters. The film's cast includes Gael García Bernal, Vicky Krieps, Eliza Scanlen, Thomasin McKenzie, Alex Wolff, Abbey Lee, Aaron Pierre, Rufus Sewell, Ken Leung, Nikki Amuka-Bird, Embeth Davidtz, Emun Elliott, and Kathleen Chalfant, and follows a group of people who find themselves aging rapidly on a secluded beach they cannot escape from.

The film was announced in October 2019 after Shyamalan read the graphic novel by Levy and Peeters. The cast joined the following summer, with filming taking place from September to November in the Dominican Republic. It marked the first film of Shyamalan's career to have no shooting take place around his hometown of Philadelphia, Pennsylvania. 

 Following a delay due to the COVID-19 pandemic, Old was theatrically released on July 23, 2021, in the United States, by Universal Pictures. The film received mixed reviews from critics, who praised the film's premise and cinematography but criticized its screenplay and uneven execution.