Which actor played the role of Octavian in the 1963 film "Cleopatra"?

I know this question is about Roddy McDowell, but I am more interested in Cleopatra. She was the last of the Ptolemaic pharaohs. It was Alexander the Great who conquered Egypt and established this line of GREEK rulers in Egypt. Alexandria was named for him and this is the area that the fleeing Jews came to against Jerimiah's warning.