At the end of the roller skate dance number in the park the stars flop onto the "lawn". In the film both Fred Astaire and Ginger Rogers appear uncomfortable as they get up. This is because both were bruised from more than fifteen earlier takes and were actually in pain.
The song, "Hi-Ho," was written for this movie as an opening number, but was dropped because of the expense of filming it. It was published in 1967. The song "Wake Up Brother and Dance" was also written for the movie and published in 1937 with the other songs, but it was dropped to make room for the title song. It appeared in the movie Kiss Me, Stupid (1964) with the title "Sophia."