The open-air extravaganza will take place May 20, with more acts to be announced soon. The show is expected to span three hours, with appearances by a wealth of celebrity guests.

Prince Charles, who founded the youth charity organization in 1976, is expected to attend along his wife Camilla and sons William and Harry.

The three princes will give a joint interview on ITV during the concert, which the network will broadcast in its entirety.

The Prince’s Trust is launching a national fund-raising and advertising campaign, with the goal of raising millions of pounds to help disenfranchised British youth.