List of Famous people who died at 55

Peter Martin Christopherson was an English musician, video director, commercial artist, designer and photographer, and former member of British design agency Hipgnosis.

Ivan Alexandrovich Tcherepnin was an experimental, then later modernist/postmodernist, composer and a noted innovator in the field of electronics and modular synthesizers.

William DeWolf Hopper Jr. was an American stage, film, and television actor. The only child of actor DeWolf Hopper and actress and Hollywood columnist Hedda Hopper, he appeared in predominantly minor roles in more than 80 feature films in the 1930s and 1940s. After serving in the United States Navy during World War II, he left acting, but in the mid-1950s, he was persuaded by director William Wellman to resume his film career. He became best known for his work as private detective Paul Drake in the CBS television series Perry Mason.