Principal photography on Marvel's Doctor Strange commences in November, but Oscar winner Tilda Swinton reportedly still hasn't decided which gender she'll play her character as yet.

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Swinton has been cast as Strange's mentor, the Ancient One , a character traditionally depicted in the Marvel Comics as an elderly, Asian male. The Guardian has published a new interview with Swinton in which they claim "she will soon start shooting a Marvel blockbuster, Doctor Strange, but there is a Swinton-esque twist – she doesn’t yet know if she will play the part as a man or a woman."If she opts to play the Ancient One as male, it wouldn't be the first time Swinton has played a supernatural male in a comic book movie. She previously played the angel Gabriel in the big screen version of Constantine.Tilda Swinton can currently be seen onscreen in Trainwreck.