Hauer attended a Rudolf Steiner school, as his parents wanted him to develop his creativity. At the age of 15, he left school to join the Dutch merchant navy. He spent a year travelling the world aboard a freighter, but was unable to become a captain due to his colourblindness. Returning home, he worked odd jobs while finishing his high school diploma at night. He then entered the Academy for Theater and Dance in Amsterdam for acting classes, but soon dropped out to join the Royal Netherlands Army. He received training as a combat medic, but left the service after a few months as he opposed the use of deadly weapons. He subsequently returned to acting school and graduated in 1967.
Hauer attended a Rudolf Steiner school, as his parents wanted him to develop his creativity. At the age of 15, he left school to join the Dutch merchant navy. He spent a year travelling the world aboard a freighter, but was unable to become a captain due to his colourblindness. Returning home he worked odd jobs while finishing his high school diploma at night. He then entered the Academy for Theater and Dance in Amsterdam for acting classes, but soon dropped out to join the Royal Netherlands Army. He received training as a combat medic, but left the service after a few months as he opposed the use of deadly weapons. He subsequently returned to acting school and graduated in 1967.