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Mark Gatiss is an English actor, screenwriter, television producer, comedian, novelist, and director. As a writer, he has worked on shows, such as Doctor Who, Sherlock (which he co-created and played Mycroft Holmes), and Agatha Christie's Poirot. He is also a member of the comedy team, The League of Gentlemen.

For Disney, he portrayed Giles Winslow Jr. in the 2018 live-action film, Christopher Robin.

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