<Li> Rosa Salazar as Brenda </Li> <Li> Patricia Clarkson as Ava Paige </Li> <P> In March 2015, it was confirmed that T.S. Nowlin, who co-wrote the first and wrote the second film, would adapt Maze Runner: The Death Cure . On September 16, 2015, it was confirmed that Ball would return to direct the final film . </P> <P> Principal photography began on March 14, 2016, in Vancouver, British Columbia . Previously it was revealed at San Diego Comic - Con International that filming would begin in February 2016 . </P>

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