Eric Clapton and Badly Drawn Boy have signed on to perform at a tsunami relief concert Jan. 22 at the Millennium Stadium in Cardiff, Wales.

Embrace, the Manic Street Preachers and Jools Holland have also signed to play the event, Billboard reported Monday. More acts are expected to sign on in the coming days.

The concert will donate all proceeds to victims of the Dec. 26 tsunami in South Asia. Organizers hope the event will earn at least $1.87 million.

Stadium manager Paul Sergeant said 45,000 tickets, about two-thirds of the total seats, have already been sold.