Flynn se narodil v Miami na Floridě, kde navštěvoval střední školu New World School of the Arts. Bakalářský titul získal na škole umění Mason Gross na Rutgerské univerzitě v New Jersey v roce 2016. [1 ] Má dvě sestry, Jaime a Danielle.
Brandon Paul Flynn (born October 11, 1993) [1 ] is an American actor, known for his role as Justin Foley in the Netflix teen drama series 13 Reasons Why (2017–2020).