Some great sight gags made this a big hit in its day, enough that two sequels were made (although not nearly as good.)
Cary Grant and Constance Bennett certainly are a handsome leading couple but it's Roland Young, as "Cosmo Topper," who steals the show. He's a stiff old man who quickly loosens up and the transformation is fun to watch.
Bennett was a legitimate 1930s glamor girl who looks just great in here and pairs off well with the handsome Grant. The two of them also exhibit a good comedic touch. They had a lot to offer besides good looks. Even more handsome than those two was the automobile - wow, what a great-looking sports car! I''m glad to see other reviewers comment on it. It was awesome.
By the way, I know Hollywood liked to preach in some of these classic films that everyone gets into heaven, but this was "topped" them all. In here, the theology was that "all it takes is ONE good deed" during your lifetime.
Ohhhhh-kay.