Brandon Flynn

In 2016, Flynn was cast as Mike the Intern in BrainDead. In 2018, Flynn was cast in the third season of True Detective as Ryan Peters in a recurring capacity.

From 2017 to 2020, Flynn portrayed Justin Foley in the Netflix series 13 Reasons Why. Foley, one of the lead characters through all four seasons, is a troubled yet ultimately redemptive character who starts as a popular high school jock with a traumatic home life and spirals into homelessness, addiction, and sex work.

In 2020, Flynn made his feature film acting debut in the dark indie comedy Looks That Kill, starring as a high school student whose physical appearance causes the death of anyone who looks at him. In the same year, he had a recurring role as Henry Osgood in the 2020 television series Ratched, a quadruple amputee and sadist who lives locked in his home with his mother, Lenore Osgood. He has starred in a number of other television series and films, including Manhunt (2024), a historical drama about the hunt for Abraham Lincoln's assassin John Wilkes Booth, and the horror-comedy The Parenting (2025).

Flynn's New York theater debut was in the role of Luke in the off-Broadway production of John Kander and Greg Pierce's musical Kid Victory at the Vineyard Theatre, in 2017. In 2025, he returned to the stage to play a young Marlon Brando in the off-Broadway premiere of Gregg Ostrin's play Kowalski at the Duke on 42nd Street. In 2025, he also originated the role of Dylan in the world premiere of Jeremy O. Harris's play Spirit of the People at the Williamstown Theatre Festival. In 2026, Flynn starred as Jonah in Matthew Libby's off-Broadway play Data at the Lucille Lortel Theatre alongside Karan Brar, Sophia Lillis, and Justin H. Min.

Flynn has starred in multiple Calvin Klein campaigns, including the brand's 2023 Pride campaign, the 2023 holiday campaign, and the Spring 2024 menswear campaign.