Harry Potter and the Chamber of Secrets is a 2002 fantasy film directed by Chris Columbus from a screenplay by Steve Kloves. It is based on the 1998 novel Harry Potter and the Chamber of Secrets by J. K. Rowling. Produced by David Heyman, it is the sequel to Harry Potter and the Philosopher's Stone (2001) and the second instalment in the Harry Potter film series. The film stars Daniel Radcliffe as Harry Potter, with Rupert Grint and Emma Watson as his best friends Ron Weasley and Hermione Granger respectively. The story follows Harry's second year at Hogwarts School of Witchcraft and Wizardry, where the Heir of Salazar Slytherin opens the Chamber of Secrets, unleashing a monster that petrifies the school's students.

The film was released in the United Kingdom and the United States on 15 November 2002, by Warner Bros. Pictures. Critics praised its darker plot, sets, performances (especially Branagh, Coltrane and Isaacs), and a story appropriate for a young audience, and it became a critical and commercial success, grossing $878 million worldwide (domestic 29.7% and foreign 70.2%) and becoming the second-highest-grossing film of 2002. The film was nominated for many awards, including the BAFTA Award for Best Production Design, Best Sound, and Best Special Visual Effects. It was followed by Harry Potter and the Prisoner of Azkaban (2004).