The WRU also say both home fixtures in the 2025 Six Nations will be played in front of sell-out 74,000 crowds at the Cardiff venue.
Ireland visit the Welsh capital on Saturday, 22 February (14:15 GMT) before Warren Gatland’s side host England on Saturday, 15 March (16:45 GMT).
“Selling out both of our home fixtures is an achievement reflective of the excitement building ahead of another thrilling Guinness Six Nations campaign at the world renowned Principality Stadium,” said WRU chief executive Abi Tierney.
“Both senior men’s home fixtures have been in high demand and this is a fantastic achievement and a sign of the passion and belief that Welsh rugby fans have for this team.
“Principality Stadium is one of the most iconic sporting venues in the world and our retractable roof, one of our most distinctive features, enables us to create an amazing atmosphere with the the match day experience set to come alive during the 2025 Six Nations.”
Wales begin their Six Nations campaign against France in Paris on Friday, 31 January before facing Italy in Rome eight days later.
The side, who finished bottom of the championship without a win in 2024 and have lost a record 12 internationals, also travel to Scotland on Saturday, 8 March, before the concluding home fixture against England.
