Darren Cave has agreed a new two-year deal with Ulster, keeping him at the Irish province until the summer of 2015.
The centre has played 89 times for Ulster, scoring 20 tries since making his debut five years ago.
The 25-year-old is also an Ireland international and has three caps to his name.
Cave told Ulster's website: "Signing this new contract was probably the easiest decision that I have ever made in my life, especially at a time when the team have just won 12 competitive matches in a row.
"I honestly think that Ulster are going to win something between now and the summer of 2015 and I would never forgive myself if I wasn't around to be a part of that."
Ulster's Director of Rugby David Humphreys added: "I am delighted Darren has committed to Ulster for a further two years.
"He is a highly dedicated player, who gives his all in both training and matches.
"Darren has been an important part of our success in recent seasons and the exciting thing is that his best years in an Ulster shirt are ahead of him."