Anita Louise plays a 16-year-old in the film; she had actually just turned 16 when the film was released.
The film rights to the novel were first offered to MGM, but they passed due to its racy content. Charles R. Rogers purchased the rights in August 1930 and produced this as an independent film but sold the distribution rights to RKO after he was made chief executive of RKO-Pathé in January 1931.
In 1959, Millie (1931) entered the public domain in the United States because the claimants did not renew its copyright registration in the 28th year after publication.
Millie (1931) is available for free viewing and download at the Internet Archive. It is also available for viewing on YouTube.
Mark (Harry Stubbs) says he plans to continue traveling the world right after he finishes some business in Omaha. In 1931 Omaha had a population of about 215,000 and was the 39th largest city in the United States.