Kenny "Ken" Waller (born March 20, 1942) is an American former bodybuilder featured in the 1977 movie Pumping Iron, which starred Arnold Schwarzenegger. Waller also won the 1975 International Federation of Bodybuilders (IFBB) Mr. Universe contest in Pretoria, South Africa. He was known for his curly red hair and freckles — to this day, one of the very rare redheaded professional bodybuilders in the sport — and his graceful, confident posing style.