He is famous for his role as the Siamese king in the musical The King and I on theater and in the movie , as well as Rameses II in the 1956 Cecil B. DeMille movie The Ten Commandments and as Chris Adams in The Magnificent Seven . He is also remembered as Rameses II in the 1956 Cecil B. DeMille film The Ten Commandments , General Bounine in Anastasia and Chris Adams in The Magnificent Seven .