Published Sunday, 20 July 2014
McIlroy celebrates with the famous trophy. (© Getty)
McIlroy lifted the famous Claret Jug on Sunday evening after leading the prestigious tournament from the beginning.
The 25-year-old went into the final round with a six shot lead and finished the day two shots off nearest rival Sergio Garcia.
The win is Rory's third major and he joins Jack Nicklaus and Tiger Woods as having achieved the feat by the age of 25.
Rory has also become the first European to win three different majors since The Masters was founded in 1934.
Moments after the Holywood golfer secured the title Mr Cameron tweeted his congratulations.
First Minister Peter Robinson and deputy First Minister Martin McGuinness MLA also praised the 25-year-old.
In a statement, the ministers said: "We congratulate Rory on becoming the 2014 Open Champion.
"He has delivered a golfing masterclass over the last four days at Royal Liverpool.
"Having won three majors, Rory now joins golfing greats Jack Nicklaus and Tiger Woods as the only players to win three majors by the age of 25.
"Rory is an exceptionally talented golfer and with his strong work ethic, he will undoubtedly go on to achieve many more great wins in his career.
"Rory is a fine ambassador for Northern Ireland. We are all very proud of his achievements and hopefully he can carry this rich vain of form into the Ryder Cup at Gleneagles in September."
Enterprise Minister Arlene Foster said the win would be a huge boost to the local tourism economy.
Celebrations were also held at McIlroy's home golf course at Holywood golf club.
Young fan Rory Williamson told UTV: "Everything is special about Rory.
"This week his iron play and his driving has just been awesome."
© UTV News