One member of Holywood Golf Club had more reason than most to celebrate after landing a small fortune, believed to be £25,000, on a bet placed when Rory McIlroy was a promising youngster.
And McIlroy's father Gerry could soon be in line for an even bigger payout if his son can repeat his stunning performance in the US Open in next month's Open Championship.
It is understood the shrewd punter at McIlroy's hometown club got odds of 500/1 when he put £50 on the teen prodigy to win a major before the age of 25.
At just 22, he did it with three years to spare.
The bet placed by McIlroy's father, a former barman at Holywood Golf Club, was similar but specifically on him winning the UK's Open Championship before his 25th birthday.
He and friends put £100 each into a kitty and also got odds of 500/1.
Mr McIlroy stands to win £50,000 if his son lifts the famous Claret Jug in the next three years.
After his thrilling showing at Congressional, the golfing sensation has been installed as favourite for the Open at Royal St George's at rather more modest odds of around 6-1.
The syndicate must be quietly confident that they made a wise investment all those years ago.
Meanwhile, McIlroy has been installed as odds on 10/11 favourite to lift the coveted BBC Sports Personality of Year Award in December.