Published Monday, 20 June 2011
In the archive video dating from 1999, nine-year-old Rory - who had just been crowned the Under-10 World Champion in Florida - is seen chipping balls into the drum of a washing machine on the Kelly Show in front of a live studio audience.
Young Rory tells Gerry that chipping air balls along the hall of his Holywood home, through the kitchen door and into his mum's washing machine is part of his training.
When asked what the best part of his game is, Rory says: "Chipping."
Rory's father Gerry and mother Rosie are in the audience, showing their commitment to the young prodigy's career.
The Americans have Tiger Woods. We have young Rory and, believe you me, this boy can hit a ball.
Gerry Kelly on UTV in 1999
Talking about Rory's Under-10 win, mum Rosie tells Gerry: "We didn't go over there to lose it."
Dad Gerry missed out on a medal collection ceremony at Holywood Golf Club on the night of the TV show. So Rory surprises him by giving him the medal in the studio instead.
"Even though you weren't at the dinner tonight, I want you to have this dad."
On Sunday, McIlroy clinched his maiden major title by eight shots with a 16 under par total at Congressional, sealing an historic back-to-back victory for Northern Ireland.
The new US Open champion celebrated his victory with his father on the 18th green, wishing him 'Happy Father's Day'.
Holding the trophy a few minutes later, the 22-year-old dedicated what is one of the most notable victories in the 111-year history of the tournament to his dad, saying: "This one is for you".
In 1999, young Rory told UTV Darren Clarke was his favourite Irish golfer.
Twelve years later, Clarke has withdrawn from this week's European Tour event in Munich because he wants to be in Northern Ireland for McIlroy's homecoming party.
Clarke sent repeated messages of encouragement to the 22-year-old, including one before the final round saying: "Show them how good you are."
The 42-year-old, who won his 13th Tour title in Majorca last month, did not qualify for the US Open.
© UTV News