The Godolphin three-year-old started favourite for the Derby but faded out of contention in the home straight. However, he was back to his best yesterday under Frankie Dettori and easily proved three lengths too strong for the Andre Fabre-trained State Shinto.
Luca Cumani's Manndar was a further half-length back in third. However, the third British representative, Salford Express, dropped tamely away from a prominent early pitch, eventually finishing a remote last.
Dubai Millennium's trainer, Saeed bin Suroor, said: "I think a mile might be his best trip but he saw this mile and a quarter out all right. I am absolutely delighted with him, especially after his Epsom disappointment."
Richard Quinn, who rode Salford Express, beaten almost 20 lengths by the winner, commented: "He changed his legs many times and was never giving me a good feel."
n Mac River, trained at Newmarket by Mick Quinlan, finished third in the Listed Premio Giuseppe de Montel in Milan yesterday.
3.10: (1m 2f 3yo Prix Eugene Adam) 1. DUBAI MILLENNIUM (L Dettori); 2. State Shinto; 3 Manndar. 5 ran. 3, 1/2. (Saeed bin Suroor, Newmarket). Pari-mutuel: 1.70; 1.50 1.30. Jumele (CSF): 9.50.Reuse content