Clark Gable had to shave his (by then) trademark mustache for the film.
According to an article from the Rochester Evening Journal by Carol Fitzhugh (June 29, 1936, page 8), all of the clothes that Marion Davies wears in the film are in "ink blue".
The elaborate musical numbers were filmed within stage 7 (now stage 16) at Warner Brothers Studios in Burbank, California. To accommodate the enormous sets, the roof and walls of the structure were raised an additional 35 feet. The project, costing $100,000 in 1936 dollars, was paid for by William Randolph Hearst.