Arnold Schwarzenegger
Self
M
Mike Katz
Self - Mr. World 1973
Lou Ferrigno
Self - Mr. Universe 1974
Franco Columbu
Self - Mr. Olympia 1981
George Butler
Self - Director
J
Joe Weider
Self - Bodybuilding Publisher
B
Bill Grant
Self - Mr. America 1971
K
Ken Waller
Self - Mr. Universe 1975
R
Reg Park
Self - Friend and mentor
E
Ed Corney
Self
M
Matty Ferrigno
Self (archive footage)
Liev Schreiber
Self - Narrator (voice)
Sylvester Stallone
Self
Bud Cort
Self (archive footage)