He is best known for his role in the miniseries When They See Us (2019), for which he received a Primetime Emmy Award nomination.
One of his first professional roles was in "How I Learned to Be a Kid" at the Howard Theatre in Washington, after which he got an agent.
Blackk originally auditioned for the role of Korey Wise, one of the exonerated members of the Central Park Five, in the dramatized miniseries When They See Us but was instead cast as the 14-year-old Kevin Richardson in the series.
[4] The role earned him an Primetime Emmy Award nomination, making him one of the youngest nominees in its history.
[5] Blackk appeared as a series regular on This Is Us from 2019 until the show ended in May 2022, for which he was nominated for a Critics' Choice Television Award.