In 2015, American Pharoah became the first horse in 30 years to win the American racing Triple Crown, and the 12th overall. Three years later, the unbeaten Justify did it again.
Thirty-two horses have won the Kentucky Derby and Preakness Stakes double, with the most recent being Justify in 2018.
No Australian jockey or trainer has won a Kentucky Derby.
American horse racing dates back to 1665, but organised horse racing under Jockey Club rules didn’t begin until 1868, seven years after Archer won the first Melbourne Cup at Flemington.