Cesium Fallout is a 2024 Hong Kong disaster thriller film produced and directed by Anthony Pun, produced by and starring Andy Lau. Touted as the first nuclear radiation disaster-themed blockbuster production from Hong Kong, the film revolves around an accidental radioactive leak in the city which puts the lives of seven million citizens at risk.
Production took place throughout 2024. The film was theatrically released on 1 November 2024.