"An announcement will be made through our website, www.millenniumstadium.com if and when the tickets become available."
Badly Drawn Boy, Eric Clapton with Jools Holland and The Rhythm & Blues Orchestra, Embrace, Feeder, Aled Jones and Katherine Jenkins, Lemar, The Manic Street Preachers and Snow Patrol have already been announced as performing at the event. More acts will be unveiled later this week.
With all profits going to aid the victims of the tsunami disaster the Millennium Stadium is hoping to raise over £1 million from the concert.
A limited number of disabled tickets are still available by calling 029 2082 2433.
For full updates on Tsunami Relief Cardiff visit www.millenniumstadium.com/tsunamirelief