His Highness Grand Duke Charles, Regent of the Balkan state of Carpathia, with the fake, unintelligible accent (Laurence Olivier) meets Elsie Marina of Wilwaukee (Marilyn Monroe) in what has to be the longest, dullest 1 1/2, 2, 3 hours I have spent watching a movie in a very long time. He may have been the best actor of his generation, but you would be hard pressed to prove it from Olivier's performance here. Monroe, of course, plays the role she was usually assigned, the sexy dumb blonde.
I suppose Olivier should get most of the blame for this fiasco since he directed the movie in addition to starring in it. In Olivier's defense, however, I recall that he wanted his wife Vivian Leigh to play the role of Elsie rather than Ms. Monroe. Of course Ms. Monroe could have turned the offer to play Elsie down.
There are occasionally mildly funny scenes in the movie, but they are few and far between. After all a comedy should be funny.
Oh, 3/4 of the way through the movie, Elsie breaks out into song! Do I need to say more?
Both these actors made many good movies. This is not one of them.