Collin Morikawa produced a stunning final round to win The Open by two strokes from Jordan Spieth at Royal St George's.
The 2020 US PGA Championship winner added a second major to his list of honours in only his eighth appearance in such tournaments, with this his debut at the oldest of golf's four headline events.
His blemish-free 66 on Sunday ensured he overturned the one-stroke overnight lead that Louis Oosthuizen had held, while Spieth closed with the same score as he came up just short.
Morikawa nailed a lengthy birdie putt on the 14th, just after Spieth's run of four gains in four holes around the turn had cut the gap to one, and the 24-year-old never looked back as he sealed the prize on 15 under.
Spieth, the 2017 champion at Royal Birkdale, and Oosthuizen, who triumphed at St Andrews in 2010, had each been chasing a second Claret Jug.
But Morikawa showed nerves of steel as he refused to wilt in the sunshine on the Kent coast, the American averaging 1.5 putts per greens in regulation.
He needed to hit such a high level to keep Spieth at bay, his compatriot rallying from two over for the day after six holes to close at 13 under.
Oosthuizen endured the frustration of finishing as runner-up at the US PGA Championship and the U.S. Open this year and he suffered more disappointment following a closing 71.
Pre-tournament favourite Jon Rahm wrapped things up in style with a 66 and he will return to the world number one spot next week, displacing Dustin Johnson.
Reigning champion Shane Lowry finished at six under, while Rory McIlroy closed with a 71 to wrap up a low-key outing at even par.
SHOT OF THE DAY
Morikawa's approach shot on the 14th was short and left him with a long uphill putt for birdie on a par five that was playing at a generous average of 4.6.
Spieth was on the charge and momentum looked to shift in the three-time major winner's favour, but Morikawa turned a potential negative into an overwhelming positive with one decisive swipe of the putting blade.
It was the point at which the engravers may as well have started putting his name on the silverware.
Shane Lowry: "I really enjoyed the whole week. It was an amazing experience. Walking down the last hole today was one of the coolest things you'll ever get to do, and I got to do it."
Rory McIlroy: "For me at the minute it's just the process of trying to work my way back to the sort of form and the sort of the level that I know I can play at."
Brooks Koepka: "I like coming over here and playing links golf. It's always a bunch of fun, and I've always said that it's the one tournament a year where the fans actually know what a good shot is."
A LITTLE BIRDIE TOLD ME
- Louis Oosthuizen's last three major results are now tied second (US PGA Championship), second (U.S. Open), and tied third (The Open).
- Shane Lowry's failure to retain the Claret Jug means no player has successfully defended the honour at Royal St George's since Harry Vardon in 1899.
- Germany's Matthias Schmid won the silver medal for low amateur after finishing two over par.