Max is a charming and lively Jack Russell Terrier who is one of the main characters in the animated film series 'The Secret Life of Pets'. He is a loyal and loving pet who lives with his owner, Katie, in a New York City apartment. Max's life is turned upside down when his owner brings home a new dog named Duke. Throughout the series, Max's adventures lead him to learn about friendship, loyalty, and bravery, as he navigates the challenges of living in a bustling city filled with diverse and quirky animals.