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Ellie Kemper lends her voice to the animated character of Katie, the loving owner of two mischievous pets, Max and Duke, in the popular 2016 animated comedy film "The Secret Life of Pets." The movie delves into the secret lives of pets when their owners are away, showcasing their adventures, friendships, and antics while providing heartwarming lessons on loyalty, acceptance, and the unbreakable bonds between pets and their human families.