Sebastian Chacon was born in New York City. After graduating from New York University, he began acting in the theatre, performing in venues such as The Duke on 42nd, Cherry Lane, and The Public Theater. He got his first TV role as Stevie Boy in The Get Down (2016), where he initially had no part written and improvised all of his lines. Over the next few years, he continued to guest star in many shows such as Mr. Robot (2015), Pose (2018), and Narcos (2015). In 2020, he portrayed the slick gangster Fly Rico in the Showtime television series Penny Dreadful: City of Angels (2020). In February of 2020, Chacon joined the cast of the Amazon Video series Daisy Jones & The Six (2023) as the band's affable drummer, Warren.