The first Mr Olympia was held in 1965 and there are other body building competitions available of which this is the most prestigious. It is not a new sport and this is certainly not the first winner.
Agreed this is not the first time that Mr Olympia was conducted. Infact Arnold Schwarzenegger was the winner of this competition in a row from 1970 to 1975. Due to social media this body building competition is getting more coverage than it used to get earlier. This who are into body building will be aware of it.