Australia trainer Aidan O'Brien has become the first trainer to win the Epsom Derby three times in a row, with his horse taking out the biggest prize of the day ahead of Kingston Hill and Romsdal.
Australia went into the race as overwhelming favourite at 11-8 and never looked seriously threatened throughout, with O'Brien having described the horse as the "best I've trained."
Jockey Joseph O'Brien added: "Horses don't come any easier to ride than this. He's the best."
The son of Galileo finished a length and a quarter ahead of Kingston Hill, with 20-1 outsider Romsdal coming three and a quarter lengths behind second place.
After coming third in the Qipco 2000 Guineas, Australia was the overwhelming favourite as Aidan confirmed his son as the rider for the Derby.
More suited to the mile-and-a-half race, it was believed he would definitely outperform his Guineas run and now the O'Briens have made history as the first to win it three consecutive times.