McIlroy famously had only had one coach throughout his entire career and indeed virtually his entire golfing journey.
His father Gerry connected Rory with Michael Bannon, then a club professional in McIlroy's hometown of Holywood. The partnership yielded one of the smoothest swings in golf honed through endless hours of practice.
Less than two years after turning professional, McIlroy became the youngest man to top €10million ($12m) in career earnings on the European Tour.
McIlroy has been part of four Ryder Cup-winning efforts, representing Europe five times since his 2010 debut.
His path to stardom
McIlroy took up golf from an early age and soon began winning tournaments, including the World Under-10 Championships at the age of nine.
The Tour was calling
From zero to hero
McIlroy's 2011 season will be remembered for his contrasting fortunes at two of the year's Majors.
At the Masters, McIlroy appeared to be well on course for a first Major win when heading into the last day with a four-stroke lead. His final-round collapse will live forever in golfing infamy and the 80 he carded remains the worst score by a professional golfer leading the Masters going into the Sunday.
More major triumphs for Wee-Mac
His performances at the preceding Majors had lowered expectations, but McIlroy raised the bar with another stellar four-round display at the PGA Championship in South Carolina. He won the event by a record margin of eight strokes to become the youngest multiple Major winner in 32 years. He went on to top both the PGA Tour and European Tour money earners' list in the same season.
He recorded his strongest ever Masters finish after tying for eighth place, but he struggled to fire at the US Open. However, McIlroy had begun to take his preparation for the British Open more seriously, something that paid off at Royal Liverpool Golf Club.
A strong start to the tournament was enough to put McIlroy well on top going into the fourth round and despite the best efforts of Rickie Fowler and Sergio Garcia, he claimed his third Major title by two strokes. In doing so, he emulated Tiger Woods as the only other man to win both the Silver and Gold Medals at the Open.
His fourth Major win at the subsequent PGA Championship ensured McIlroy had recorded multiple tournament wins on both the European and PGA Tours. He shot an impeccable four rounds at Valhalla Golf Club in Louisville, Kentucky, but it was a very competitive field and he won by just one stroke over Phil Mickelson, with Fowler and Henrik Stenson just one shot further back.
McIlroy's altercations
His remarks about the Ryder Cup and British Open weather might have been put down to youth but as he has aged, McIlroy hasn't mellowed much.
Personal life
Net worth
McIlroy assumed the mantle of golf's most marketable professional during 2013 as Tiger Woods' star waned. At around the same time, he became the title star of the Electronic Arts PGA Tour video game series.
Winning the 2019 FedEx Cup gave a massive boost to his earnings and his net worth is now estimated to be in the region of $192 million.