After two wins on Wednesday, Dettori began Thursday by winning the Group 2 Norfolk Stakes aboard A'ali before claiming the Group 3 Hampton Court Stakes with Sangarius.
Dettori then made it three from three in the Group 2 Ribblesdale Stakes with Catcher Star. He then produced his biggest win of the day in the fourth race by winning a second Group 1 Gold Cup in a row aboard Stradivarius.
Dettori received the Gold Cup trophy from Queen Elizabeth II, who was joined at Ascot Racecourse by other member's of the British Royal Family.
Ahead of the fourth and penultimate day of Royal Ascot, take a look at our photo gallery above with some of the best pictures from Day 3. To move on to the next image, click on the arrows, or if using a mobile device, simply swipe.