Published Thursday, 08 November 2012
Ulster's Dan Tuohy in action. (© Getty)
The international second row, who is currently with the Ireland squad for the Autumn Internationals, will now remain at the club until June 2015.
Tuohy joined Ulster ahead of the 2009/10 season from Exeter Chiefs and wasted little time establishing himself as a regular started, amassing 74 caps in just over three seasons.
The 27-year-old said he has "unfinished business" at Ravenhill after last season's Heineken Cup final defeat to Leinster.
We did well last year in the Heineken Cup and are hoping to go one better this season
"I came over here four years ago and settled immediately," he continued.
"I feel very comfortable here and it's like a home from home for me. Ulster has looked after me really well and I'm delighted to be staying on.
"The club has made a dramatic transformation in the short time that I've been here and it's fantastic to be part of."
Tuohy added: "We also realise how important the PRO12 is and we are determined to be successful in it too. It's something I really want to be part of and I never really thought about leaving.
"There would have been a lot of unfinished business if I had left so that never even entered my mind. I'm thoroughly looking forward to helping Ulster be successful over the next few years."