Christopher Michael Hewett ( 5 April 1921 -- 3 August 2001 ) was an English actor and theatre director best known for his role as Lynn Aloysius Belvedere on the ABC sitcom `` Mr. Belvedere '' .
Christopher Michael Hewett ( 5 April 1921 -- 3 August 2001 ) was an English actor and theatre director best known for his role as Lynn Aloysius Belvedere in the American television sitcom `` Mr. Belvedere '' .