Carlos Imperio Hamburger (b. 1962, São Paulo) (or Cao Hamburger) is a Brazilian screenwriter and director of movies and TV. He is the creator of the Castelo Rá-Tim-Bum (Castle Rá-Tim-Bum) series of programs for children in the TV Cultura of São Paulo, which gave origin to a successful movie with the same title. Castelo Rá-Tim-Bum was one of the most successful children shows to air in Brazil. He directed in 2006 another successful film, O Ano em Que Meus Pais Sairam de Férias (The Year My Parents Went on Vacation), partly based on his childhood memories.
Hamburger was also one of two creative directors for Rio's contribution to the 2012 Summer Olympics opening ceremony.
Cao is the son of physicists and University of São Paulo professors Ernst Wolfgang Hamburger, of Jewish-German origin, and Amélia Imperio Hamburger, of Italian origin. He has three sisters: Sonia, a film producer, Vera, an art director and Esther, a University Professor. His brother Fernando is a photographer.