The title "Mistress of Evil" was used for some foreign language versions of the first Maleficent (2014) film, which may explain why many countries opted to use the film's alternative title, 'Maleficent 2,' dropping the subtitle altogether.
Harris Dickinson took over the role of Prince Phillip from Brenton Thwaites due to scheduling conflicts with Titans (2018). As such, Thwaites missed the opportunity to work again with director Joachim Rønning, as they had previously collaborated on Pirates of the Caribbean: Dead Men Tell No Tales (2017).
This film was the tenth to be released by Disney in 2019.
Queen Ingrith's costume is based on portraited gowns of Queens Henrietta Maria of France, Eleonora di Garzia di Toledo and Anne of Denmark
According to Ellen Mirojnick: "The castle and costume design isn't so medieval it is more like the early modern period," which is from 1550 to 1750 and costumes are based on England, France, Germany, Scotland.