Jamaican American Shawn Rhoden is the 2018 Mr. Olympia He is the oldest bodybuilder to win the title, at the age of 43,

Shawn “Flexatron”, “Jamaican Muscle Machine” Rhoden (born April 2, 1975) is a Jamaican American IFBB professional bodybuilder. He is the current reigning Mr. Olympia champion and winner of the 2018 Mr. Olympia after defeating seven-time Mr. Olympia champion Phil Heath.

Born in Jamaica, Rhoden immigrated to the United States in 1990 and settled in Maryland.[2] He went through a period of alcohol addiction following his father Lloyd’s demise in 2002 but overcame it with help from his friend Lenore Carroll.[3]

Source: Wikipedia