 John Gilbert (I) (qv) was initially cast as Carlos Margoli.  Promised to be his comeback role after a string of flops, he filmed  a few Technicolor costume tests with Marlene Dietrich (qv) (whom  he was dating at the time). He had a heart attack in his dressing  room a few weeks later and was immediately replaced by  John Halliday (I) (qv). A few days after his abrupt replacement,  Gilbert died of alcohol