Trivia: The studio originally wanted Jessica Chastain for the role of Dr. Palmer. However, Chastain turned the supporting role down because she knew taking it would take away any chance of her getting offered the role of a superhero in the MCU in the future. She said she'd rather play a caped hero in a future film.
Trivia: The film was shot partly in Nepal, with exterior scenes in several Kathmandu locations including Pashupati, home of Pashupatinath Temple, and Lalitpur's Patan Durbar Square, a unesco World Heritage site. The interiors of Kamar-Taj were created on a soundstage in London.
Trivia: When Dr Strange experiments with the forbidden Eye of Agamotto and time spells in the Book of Cagliostro, he uses an apple to practice on. Apples symbolically represent Forbidden Knowledge.
Trivia: The Mirror Dimension special effects were influenced by the art of M.C. Escher, and by fractal shapes.