The reigning Prix de l'Arc de Triomphe hero was running in a Group One contest previously known as the Prix d'Ispahan but now renamed in honour of the horse's late owner and breeder.
Mickael Barzalona took the ride for trainer Francis-Henri Graffard, and after travelling sweetly throughout the four-year-old was easily able to sweep past his rivals to secure a three-and-a-half-length victory from Leffard.
"He was a cool as a cucumber," said owner Princess Zahra Aga Khan to Sky Sports Racing.
- Notable Speech stars in 2026 Lockinge Stakes | Full race replay
- Champion filly Kalpana returns with Aston Park triumph
"To have a horse that is so flexible in terms of distance and so steady in terms of performance - he didn't seem to be bothered by anything in the race. He's a fantastic horse.
"Mickael said the horse jumped the shadows so he decided that even though it wasn't the exact right time to go, he asked the horse to go.
"I think poor old Mickael felt like he was racing over hurdles at that point, he jumped three times!
"He was completely relaxed, very engaged in the race, very chilled and absolutely in his own tempo. Not fussed, not rushed.
"If anything he was less keen than last time but that was his seasonal debut, I guess he is learning. Now we see the fully developed racehorse."
Daryz was cut with bookmakers from 7-4 to the 11-8 favourite for the Prince of Wales's Stakes at Royal Ascot as a result of his victory.
Lazzat made light work of his European return with a straightforward win in the Prix du Palais-Royal.
Jerome Reynier's star sprinter took the Queen Elizabeth II Jubilee Stakes at Royal Ascot last season and then went on to finish fifth in the Sprint Cup at Haydock before narrowly missing out on the Qipco British Champions Sprint Stakes back at Ascot.
He travelled to the Middle East in late winter to finish second in the 1351 Turf Sprint and third in the Al Quoz, but got his head firmly back in front when winning at Group Three level back on home turf under Barzalona.
