Marilyn Monroe was Mrs. Mississippi

Marilyn Monroe as Mrs. Senatobia from the film "We're Not Married."

Marilyn Monroe was Mrs. Mississippi. Yes, she was. She represented the town of Senatobia in the pageant and won it, beating out a beauty contestant from neighboring Coldwater, Miss. It happened in the film "We're Not Married!" 
The film is a romantic comedy and was released in 1952 by 20th Century Fox.
To learn more about Senatobia, visit Senatobia History & Landmarks.