The role of Sherif Ali was originally intended for
Horst Buchholz but he was forced to turn it down owing to his commitment to
Billy Wilder's movie
One, Two, Three (1961). Second choice
Alain Delon tested successfully but suffered problems with the brown contact lenses required for the role.
Maurice Ronet was then cast but was replaced after difficulties with his French accent and his Arab dress (Lean complained "He looked like me walking around in drag").
more