Acting · b. 1948 Dennis O'Neill Biography Dennis O'Neill is a Welsh operatic tenor and recording artist. Acting Kiri Te Kanawa: A Celebration Live at the Royal Albert Hall Self 2007 Andrew Lloyd Webber: The Royal Albert Hall Celebration Self - Performer 1998 Aida Radames 1994 Mefistofele Faust 1989 Verdi: Macbeth Macduff 1987 Der Rosenkavalier Sänger 1985 Die Fledermaus Alfred 1984 Agent-readable