Ozzy has raised his profile with his reality TV show

During a press conference at his family's Los Angeles home, Osbourne revealed that the event would start on 28 June in San Antonio, Texas.

Osbourne, 54, will share the main stage with rock bands Korn, Marilyn Manson, Disturbed and Chevelle.

A second stage will feature acts such as Cradle of Filth and Trust Co.

Ozzfest is one of the biggest attractions on the US concert calendar, with last year's shows grossing $26.3m (�16.3m).

In September the tour is expected to visit the UK, Germany, Scandinavia and the Netherlands - if a possible conflict with Iraq does not deter artists from travelling to Europe.