Mario Luis Kreutzberger Blumenfeld, better known by his stage name as Don Francisco, is a Chilean television host, and a popular personality on the Univision network reaching Spanish-speaking viewers in the United States. He is best known for hosting the former variety shows Sábado Gigante, Don Francisco Presenta and Don Francisco Te Invita.

Sábado Gigante is a Spanish-language television program broadcast by Spanish International Network in the United States. It is Univision's longest-running program and the longest-running television variety series in world television history. Sábado Gigante is an eclectic and frenetic mix of various contests, human-interest stories, and live entertainment. From its start in 1962, it was hosted by Chilean TV star Mario Kreutzberger under the stage name of Don Francisco. Rolando Barral and Pedro De Pool began serving as a co-hosts in 1986; that role was taken over by Javier Romero in 1991.