It was hibernation season during the shoot, and Emma the king snake was always sleeping while also shedding her skin. Needless to say, she was very uncooperative.
After The Mad Miss Manton (1938), this film, and Good Morning, Doctor (1941), Henry Fonda always would refer to Barbara Stanwyck as his favorite leading lady.
When Muggsy places a brush over his face and imitates Adolf Hitler, he is speaking Swedish. Directly translated, he is saying, "Naughty boy, I'm going to punch you in the face."
Preston Sturges wrote the screenplay specifically for Barbara Stanwyck. He had promised her a great film while working on a previous movie.
With so many people on the set, Preston Sturges dressed eccentrically so that he would stand out. He usually wore either a brightly coloured beret or a hat with a feather in it. This sartorial splendour led to his being dubbed the worst-dressed man in Hollywood.