Leonard Joseph Cariou (born September 30, 1939) is a Canadian actor and stage director. He gained prominence for his portrayal of Sweeney Todd in the original cast of Stephen Sondheim's musical Sweeney Todd: The Demon Barber of Fleet Street (1979) alongside Angela Lansbury for which he won the Tony Award for Best Actor in a Musical. He also received Tony nominations for his roles in the Betty Comden and Adolph Green musical Applause (1970), and the Sondheim A Little Night Music (1973). He is also known for his film roles in A Little Night Music (1977), The Four Seasons (1981), Thirteen Days (2000), About Schmidt (2002), Flags of Our Fathers (2006), Prisoners (2013), and ()