I liked this movie far more than expected - it's a quite funny mistaken identity kind of film - with the requisite newspapermen, wealthy men, princesses, romance that any Depression era comedy relish. I had some concern about the always serious Sylvia Sidney in a comedy - but her intelligence is just wonderful in the line readings - she's quite an actress.
Cary Grant is very young - and not quite as deft and light as in later years - but fine, not clunky at all.
Edward Arnold is thoroughly enjoyable in the kind of role he was born to play - the plutocrat. I particularly enjoyed the amusing discussion (hard to imagine in a film now) with the king of the necessary size for the bond issue for Taronia's electrification.
There is further interest in the comedy's deadly serious background of extreme poverty/destitution/fear of hunger that haunts the film - it's very much there in the asides, in the protagonist's motivation.
I hadn't realized that Sylvia Sidney (known as a real symbol of the Great Depression) and Cary Grant had worked together twice before. They work very well - and she's far prettier than I remembered.
You'll enjoy this one - the writing (by Sturges and others) is truly sparkling, the comedy is fast, intelligent and the show charming.