Charlotte Flair and Liv Morgan had to withdraw from their roles as June Byers and Clara Mortensen due to scheduling and injury issues, respectively, and were replaced by NWA Women's Champion Kamille and AEW Women's Champion Toni Storm. In June 2023, Trinity Fatu joined the cast. Kelli Berglund was cast in August 2023, having previously also played a wrestler on the television series Heels.
In the 1930s, Mildred Burke wrestled over 200 men, but only lost to one of them.
The film is based on Mildred Burke, an American professional wrestler. She is overall a three-time women's world champion under different incarnations and recognitions. Burke's heyday lasted from the mid-1930s to the mid-1950s, when she held the NWA World Women's Champion for almost twenty years. Burke started out in 1935, wrestling men at carnivals. She was managed by her second husband, promoter Billy Wolfe. She is a charter member of WWE Hall of Fame's Legacy Wing, Professional Wrestling Hall of Fame, Women's Wrestling Hall of Fame, and the Wrestling Observer Newsletter Hall of Fame.
The film's choreographer, Jett Jansen, was in the last ring fight with the actors for safety reasons, since the stunt fighting was so intense.
This film tells the story of pioneering women's wrestler and WWE Hall of Famer Mildred Burke on screen for the first time.