The 2007 Epsom Derby was a horse race which took place at Epsom Downs on Saturday 2 June 2007. It was the 228th running of the Derby, and it was won by the pre-race favourite Authorized. The winner was ridden by Frankie Dettori and trained by Peter Chapple-Hyam. The race was notable for the fact that eight of the seventeen runners were trained by Aidan O'Brien.