The birth of Henry Fonda's daughter Jane Fonda was the cause of some interruptions during his filming of Jezebel.
The red dress sequence was based on a real-life white ball in Hollywood at which all the women dutifully appeared in white - except for Mrs. MGM, Norma Shearer. Comment from another guest: "Who does Norma think she is - the house madam?"
This is the film Catherine O'Hara is watching on television at the beginning of For Your Consideration. She follows along with the dialogue suggesting that she knows the film very well. The same dialogue is also spoken at the end of the film when O'Hara is teaching the acting students.