Bob Geldof, Irish humanitarian and musician.
Geldof was interviewed live on the 19 Oct 2001 edition of "The Late Late Show" on RT� (Irish national television). When asked if he was an atheist/agnostic (the presenter used both terms) Geldof said yes; he then confirmed that he doesn't believe in an afterlife.
He is also known for his role as the lead in the film "Pink Floyd 'The Wall'"