Prior to filming, Lucie Arnaz (daughter of Lucille Ball and Desi Arnaz) had told writer/director Aaron Sorkin that it was okay to make Lucille stubborn and headstrong in the movie, as this was how she was in real life. After seeing the movie, Arnaz released a video on her YouTube Channel on 17 October 2021, in which she called the movie "freaking amazing." She complimented Sorkin for making a great movie that really captured the time period and had wonderful casting. She also said that Nicole Kidman "became my mother's soul." She also said that Javier Bardem didn't look like her dad but, "he has everything that dad had. He has his wit, his charms, his dimples, his musicality."

The movie portrays Lucy's contract at RKO being dropped after her performance in The Big Street (1942) and has RKO's head of production state that at 39 years old she should try radio. In reality Lucy was only 31 when "The Big Street" was released in 1942. Her contract was not dropped by RKO, but rather bought out by MGM, who was impressed by her performance. While working for MGM, Lucy became a redhead. She remained under contract to them until 1946. Additionally, Lucy did not seek out radio until 1948 while concurrently working in movies as a freelance actress.

Featured in The Late Show with Stephen Colbert: Javier Bardem/Gang of Youths (2021)