Serial career-changer Arnold Schwarzenegger began weight training at just 15 years old. At 20 years old he won Mr.Universe and went on to win Mr.Olympia seven times becoming one of the biggest icons in the bodybuilding world.

However, in 1970 he entered the Hollywood film industry and gained worldwide fame from his roles in action movies along with dabbling in producing and directing.

In 2003 he decided that he wanted to try something completely different and ran in the election for Governor of California and won, only leaving office last year.