Wales will face New Zealand in front of a capacity 74,500 crowd at the Millennium Stadium on November 27 after tickets for the Invesco Perpetual Series closing international match sold out.
Tickets still remain available for the opening game against Australia this Saturday (KO 2.30), South Africa on November 13 (KO 2.30) and Fiji on November 19 (KO 7.30).
The WRU Group Sales and Marketing Manager, Craig Maxwell, said: "We are delighted at the response from supporters for the New Zealand match which is great news for the Millennium Stadium.
"Interest in all four of our games has been growing steadily and this week there has been huge media focus on the series. We have a great series of matches in prospect here in Cardiff and we know the interest is going to continue to build in the weeks ahead as well.
"We were always confident it was only a matter of time before the New Zealand game sold out and the fans have proved us right.
"There are still some tickets available for the other matches so supporters will still have a chance to watch Wales play.
"The tickets for the Australia game are now selling very well but supporters will still be able to come along on Saturday and buy tickets from our outlet in the Cardiff Arms cafe and store on Westgate Street just outside the Stadium at entrance 3."
You can get tickets for Wales' Autumn internationals by calling: 08442 777888 or call in at the Cardiff Arms Store, 8 Westgate Street, Cardiff or visit www.wru.co.uk/tickets
WRU TV were on hand at the launch of a major new commercial deal with WRU and Mercedes-Benz South Wales (part of the Sinclair Group), which sees the family company become an official supplier to the Welsh Rugby Union
On the back of the recent Women's Rugby World Cup, the WRU has launched a revitalised Women's and Girls domestic seasonal structure, and the future is looking bright.
Go to www.wru.co.uk/tryourgame for more information
Roger Lewis talks to WRU TV at the announcement of a new £60 million Rugby Services Agreement (RSA) which provides a new and positive contractual relationship between the WRU and its four Regions for the next six years has been agreed.
The Welsh Rugby Union has announced a major new sponsorship deal with Gullivers Sports Travel which will make the UK's leading, and longest established, multi-sport tour operator, an Official Supplier for the rest of the decade.
Having taken part in seven World Cups as a player and coach, Liza Burgess hopes to go out in style this afternoon when Wales take on Australia in the Play-off for seventh and eighth place in the Women's Rugby World Cup in Paris.