Aja Naomi King's recent work includes The Weinstein Company's The Upside, opposite Kevin Hart, Nicole Kidman and Bryan Cranston; a lead role in Fox Searchlight's The Birth of a Nation, opposite Nate Parker and Armie Hammer, which won the Audience Award and Grand Jury Prize in the U.S. Dramatic Competition at the Sundance Film Festival. King has also appeared as the leading role in the feature film Reversion, as well as Whit Stillman's Damsels in Distress, The Rewrite for Castle Rock, with Hugh Grant; and a lead role in Christopher Shinn's Four, opposite Wendell Pierce.

Television credits include series regular roles in the The Onion News Empire for Amazon, and CW series Emily Owens M.D. Notable guest appearances include Bojack Horseman for Netflix, The Blacklist, Blue Bloods, Person of Interest and a season-long arc on the ABC drama Black Box.

On stage King has portrayed Camae in Katori Hall's play The Mountaintop, for L.A. Theatre Works and its live audio theater program.

Aja receieved the Shining Star award at the 2017 Essence Black Women in Hollywood Awards, a 2017 NAACP Image Award nomination for Best Supporting Actress in a Feature Film, a 2016 Elle Women in Hollywood Award, and a Best Supporting Actress in a Drama Series nomination at the 2015 NAACP Image Awards.

King is a graduate of the Yale School of Drama.