Llewellyn is just one game away from the longest international career in calendar years (1989-2005) of any British player.

The 35-year-old lock, who has appeared 92 times for Wales covering three decades and is in the squad competing in this year's tournament, announced his decision on BBCs Scrum V rugby review show.

Wales coach Mike Ruddock was the first to pay tribute to Llewellyn's impressive contribution to Welsh rugby and insisted he is in contention for selection in the remaining matches of the campaign.

Were disappointed to lose a player who has provided such quality and commitment to the national cause, said Ruddock.

Gareth is a determined and vastly experienced individual who is still in great condition and he is still very much a valued member of our squad.

We have discussed the matter of his retirement and with the current situation we have found it difficult to guarantee that Gareth will be a part of our plans next year and so he has taken this decision.

But it is certainly possible that he will play himself into the side before the end of the tournament.

While it was inevitable that at some stage he would decide to hang up his international boots, I know that he will be battling just as hard as he ever did to get back on the pitch before that final whistle blows on his Wales career.

He has been instrumental in helping the youngsters in the squad come good in recent years and we know he won't be going without a fight.