Michael McKillop has won the T36/37 800m at the Paralympics Anniversary Games at London's Olympic Stadium.
The Glengormley athlete came away with a time of 1:58.65 to secure gold at the stadium where he won his two Paralympic golds - in the 800m and 1,500m - last summer.
Australia's Brad Scott came home second, with Briton Paul Blake finishing third.
After his victory, McKillop said: "Today's been unbelievable, life doesn't get much better when I have the chance to run in this stadium again.
"This is where I found myself and discovered myself as an athlete, it pushed on to Lyon [in the 2013 IPC World Championships] and it's just incredible to be back here.
"Hopefully in 2017 I'll be back here for the World Championships."
The win comes just days after McKillop cemented his place as the best athlete in his class at the IPC World Championships in Lyon where he secured gold in both the 800m and 1,500m events.
Later in the afternoon, McKillop's compatriot Heather Jameson came fifth in the women's T37 100m event.
In the women's T37 100m, Ireland's Heather Jameson finished in fifth place in a time of 15.17, Germany's Maria Seifert won the race in 14.08 seconds.
In the women's F31/32/51 club, Catherine O'Neill finished third with 13.36m to get 898 points.