Arnold Schwarzenegger

Self

Mike Katz

Self - Mr. World 1973

Lou Ferrigno

Self - Mr. Universe 1974

Franco Columbu

Self - Mr. Olympia 1981

George Butler

Self - Director

Joe Weider

Self - Bodybuilding Publisher

Bill Grant

Self - Mr. America 1971

Ken Waller

Self - Mr. Universe 1975

Reg Park

Self - Friend and mentor

Ed Corney

Self

Matty Ferrigno

Self (archive footage)

Liev Schreiber

Self - Narrator (voice)

Sylvester Stallone

Self

Bud Cort

Self (archive footage)

Pumping Iron

Pumping Iron II: The Women

Raw Iron: The Making of 'Pumping Iron'