Authorized (horse) appeared at the time to be the best performance in any of the 2007 Trial races for the Epsom Derby and Authorized was made favourite for the race. Media attention ahead of the Derby focused on Frankie Dettori who, despite winning all the other British Classics at least twice each, had so far failed to win the Derby in 14 attempts. For the race itself, run at Epsom Downs Racecourse on 2 June 2007, Authorized was a clear favourite at odds of 5 to 4, and justified the odds by winning by five lengths in a fast time. Dropped back
Roseate Tern (horse) behind Michelozzo and Sapience, with Terimon in fourth place. At the end of the year, the filly was bought privately by the American businessman Peter Brant and moved to the stable of Luca Cumani at Newmarket. On her first appearance as a four-year-old Roseate Tern was ridden by Frankie Dettori in the Group Two Jockey Club Stakes over one and a half miles at Newmarket on 4 May and started third choice in the betting behind Brush Aside (an eight length winner of the John Porter Stakes on his previous start) and Assatis (Hardwicke Stakes, Gran Premio del Jockey Club).