 Michael Caine (I) (qv) was so very much beside himself to be  working with Laurence Olivier (qv), that he didnt even know how  to address him. Eventually, he broke down and just asked. Olivier  replied, "Well I am the Lord Olivier and you are Mr Michael Caine.  Of course thats only for the first time you address me. After that  I am Larry and you are Mike."