Robert Muller, Mueller or Müller may refer to: Robert Muller (United Nations) (1923–2010), Belgian-French United Nations civil servant Robert Muller (screenwriter) (1925–1998), German-born British screenwriter Robert Mueller (1944–2026), American Director of the FBI and special counsel Bobby Muller (born 1946), American peace activist Robert Müller (ice hockey) (1980–2009), German ice hockey goaltender Robert Müller (footballer) (born 1986), German footballer Robert Enrique Muller (1881–1921), official photographer for the United States Navy