Constitution River overcame a wide draw to win Sunday's Prix du Jockey Club under Ryan Moore, the hot favourite leading home stable companions Hawk Mountain and Montreal, to give trainer Aidan O'Brien a memorable 1-2-3 in the Chantilly classic.

Donnacha O'Brien's outsider A Boy Named Susie finished fourth.

An impressive Dee Stakes winner at Chester earlier this month, Constitution Hill was also among the favourites for next Saturday's Derby at Epsom but conections took the' view that the 10 furlongs of Chantilly would prove perfect for the son of Wootton Bassett.

The colt was handed a tricky draw in stall 15 of 16, but with stablemates Montreal and Hawk Mountain moving forward in the early stages while Ryan Moore kept Constitution River wide before tacking across to shadow his teammates, it was the Irish raiders who dominated affairs from start to finish.

Montreal led the Coolmore-owned trio into the straight, but the eye was always trained to Moore in the Michael Tabor silks as he asked his mount to quicken and he did so smartly to lead home Hawk Mountain in second and the pacemaking Montreal not disgraced in third.

Constitution River is a French-bred son of Wootton Bassett out of the Le Havre mare Chuppy. He was bought by Coolmore for €400,000 at the Arqana August Yearling Sale.

Hawk Mountain is also by the late Wootton Bassett but is a homebred out of Group 1 winner Hydrangea (by Coolmore).

Montreal is by Sea The Stars and id out of Muwakaba (by Elusive Quality), a mare who raced for Shadwell and is from the family of Allegretta, dam of blue hen Urban Sea.