Angelina Jolie really is singing opera in Maria, but it’s not only Jolie’s voice in the final product. The movie blended Jolie’s singing voice with recordings of the real Maria Callas, so the result is a hybrid of both Jolie and Callas’s voice.

In Pablo Larraín’s Maria, Angelina Jolie transforms into the late opera diva Maria Callas—not just physically, with her chic French wardrobe, luxurious stage looks, and curly wigs, but also vocally. The film features a mixture of her own live vocals and Callas’s archival recordings,