The job had many special requirements, which included intensive workout for the physicality of the role (Santoro had previously lost 24 lb to star in a Brazilian miniseries), extensive CGI work to portray the 6'2" Santoro as the seven-foot God-King, a four-and-a-half-hour makeup application process and the complete removal of Santoro's body hair first by waxing and then by shaving when waxing proved too painful. His eyebrows were kept intact, however, covered over with prosthetics and drawn in rather than being shaved. Santoro read the works of Herodotus, an Ancient Greek historian, in order to prepare for his part. Regarding Xerxes, he has stated: