O'Brien to join Rocky Horror revival O'Brien to join Rocky Horror revival O'Brien to join Rocky Horror revival O'Brien to join Rocky Horror revival O'Brien to join Rocky Horror revival O'Brien to join Rocky Horror revival O'Brien to join Rocky Horror revival O'Brien to join Rocky Horror revival O'Brien to join Rocky Horror revival O'Brien to join Rocky Horror revival O'Brien to join Rocky Horror revival O'Brien to join Rocky Horror revival O'Brien to join Rocky Horror revival