His health had always been poor, but a stage accident in 1916 weakened Formby's lungs, and he suffered increasingly for the next few years, reducing his ability to perform. Tuberculosis and influenza—the latter contracted in the pandemic of 1918—weakened his constitution further, and he died of pulmonary tuberculosis in 1921 at the age of 45. Formby's act, and one of his costumes and canes, inspired Charlie Chaplin in the formation of his character the Tramp. Formby's son also used parts of his father's act when starting his stage career and, once established, also changed his name to George Formby; Formby Jr went on to become the top British male star in box office takings between 1937 and 1943.