As a two-year-old in 2013, he won two of his three races, creating a very favourable impression when winning the Breeders' Cup Juvenile Turf Trial Stakes, and was highly regarded by his trainer Aidan O'Brien.

[4] Australia's Dam Ouija Board won seven Group One races including the 2004 Epsom Oaks and was twice named European Horse of the Year.

He is the fourth foal produced by Ouija Board and second to Galileo, Australia's older sister Filia Regina has had limited success with only a single victory in a handicap at Yarmouth.

In October 2012, the yearling was sent to the Tattersalls sales where he was bought for 525,000 guineas by the bloodstock agent Dermot "Demi" O'Byrne acting on behalf of John Magnier's Coolmore organisation.

[5] For racing purposes, Australia runs in the ownership of a partnership consisting of Susan Magnier, Derrick Smith, Michael Tabor and the Malaysian architect and entrepreneur Teo Ah Khing of Desert Star Holdings.

[6] Jockey Joseph O'Brien rode Australia in all the races of his career and has worn the purple silks of Derrick Smith on all those occasions.

[9] Australia was then moved up in class for the Group Three Breeders' Cup Juvenile Turf Trial Stakes over one mile at Leopardstown Racecourse on 7 September.

Orchestra won the Chester Vase and the odds on him following up the win with a Derby victory like Ruler of the World the previous year were shortened.

Kingfisher won the Dee Stakes whilst Geoffrey Chaucer finished third in a messy renewal of the Derrinstown Stud Derby Trial.

[14] The threat of rain on Derby day also caused a further lengthening of Australia's odds as it was thought that Kingston Hill would do well on the softer ground.

Once underway the 50/1 outsider Our Channel took the early lead and set a strong pace from Kingfisher, with Kingston Hill next as Joseph O'Brien settled Australia towards the rear of the field.

Approaching the final turn Australia made rapid progress on the outside and moved into contention early in the straight as Kingston Hill took the lead.

On 14 September, Australia faced a rematch against The Grey Gatsby in the Irish Champion Stakes at Leopardstown and started the 30/100 favourite against a field which also included Al Kazeem, Mukhadram and Trading Leather despite Joseph O'Brien being unable to ride at 126 pounds, leading to the colt carrying 127.

Mares revealed include Highland Gift, the dam of Golan and Tartan Bearer and Azeema, a half sister to Al Kazeem.