The Northern Irish international told the Hull Daily Mail: "I'm just delighted everything has been sorted out. I could not be any happier.
"The club has been fantastic with me. This is the best time of my entire career and I hope there's a lot, lot more to come."
He follows Damien Delaney who signed a new three-year deal in recent weeks, and the likes of Ryan France, Andy Dawson, Marc Joseph and Jason Price are also set to begin negotiations for extending their contracts.