The 35 year-old secured a sixth career ranking success and first on home soil.
Ranking
Mark Allen Triumphs in Northern Ireland Open Thriller
The showdown took place amid a frenzied atmosphere in Belfast.
Northern Ireland Open Final: John Higgins vs Mark Allen
Both players are seeking a second career victory in the Home Nations series.
Northern Ireland Open: Semi-Finals Draw and Preview
Two wins separate the remaining players from the £70,000 top prize.
Northern Ireland Open: Quarter-Finals Draw and Preview
Eight players remain in the chase for the £70,000 top prize.
Top Seeds Trump and Selby Advance Again in NI Open
Trump is guaranteed to return to the world number one spot ahead of Selby at the end of this tournament.
Judd Trump Extends Northern Ireland Open Streak to 23
The world number two hasn’t lost in the event since 2017.
Shaun Murphy: ‘Any momentum I had has gone’
The Magician is looking to add to his career haul of nine ranking titles.
Ronnie O’Sullivan Safely Through in Northern Ireland
The Rocket has reached the final in each of the last three campaigns.
Mark Allen on 147: ‘I wanted to do it for the fans’
It was the Pistol’s second career maximum break in competitive play.