Alhaarth, a bay horse with a white blaze standing 16 hands high, was bred in Ireland by his owner Hamdan Al Maktoum's Shadwell Stud. He was sired by Unfuwain out of the mare Irish Valley. Unfuwain was a high-class middle distance runner who won four Group races before siring the winners of more than five hundred winners at stud. Irish Valley, who never raced, was a half-sister to the Poule d'Essai des Poulains winner and Champion sireGreen Dancer and in addition to Alhaarth, produced the Prix du Calvados winner, Green Pola.