Dylan O’Brien chats with ET’s Cassie DiLaura at the Toronto International Film Festival before the world premiere of his new movie, ‘Being Heumann.’ Dylan shares why TIFF allowed for ‘the most special reunion’ for the cast, and reflects on his time on the ‘All Too Well’ set with Taylor Swift, as that short film celebrates its fifth anniversary. ‘Being Heumann’ opens in select theaters on Nov. 6, before hitting Apple TV on Nov. 13.
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