"After proudly representing Northern Ireland on 57 occasions, I feel now is the right time to announce my retirement from international football.
"I've enjoyed the highs of a major tournament - being part of the squad in France at Euro 2016 was the proudest point of my international career.
"I would like to thank the manager, Michael O'Neill, for selecting me on so many occasions to represent my country, and also to the players I've played with through the years. We've had some enjoyable times.
"A huge thank you, too, to the GAWA for the tremendous support offered through the years. In my opinion, the GAWA really are the best fans in the world and hopefully the squad can deliver more success for you to enjoy."