Okieriete 'Oak' Onaodowan (born August 16, 1987, Newark, New Jersey) is an American actor and singer of Nigerian descent who originated the dual roles of Hercules Mulligan and James Madison in Lin-Manuel Miranda's Hamilton on Broadway in 2015, earning a Grammy Award as part of the original cast recording. He went on to star as firefighter Dean Miller in the ABC drama Station 19 (2018-2021) and has remained a busy stage presence, appearing in A Doll's House opposite Jessica Chastain and leading the sci-fi comedy series Demascus on Tubi in 2025.
Onaodowan attended the 78th Annual Tony Awards at Radio City Music Hall, where the original Hamilton cast reunited for a 10th-anniversary medley performance.
Onaodowan was announced as a featured performer at Stage Time Spectacular, a night of burlesque, aerial, drag, and live music at New York's Slipper Room.
Onaodowan starred in the off-Broadway premiere of The Monsters at Manhattan Theatre Club's New York City Center, a play about siblings written and directed by Ngozi Anyanwu.
Onaodowan attended the special New York premiere of the Hamilton film at The Public Theater's Delacorte Theater in Central Park.
Onaodowan led the six-episode sci-fi comedy series Demascus, originally developed by AMC and revived as a Tubi Original, premiering August 7, 2025.
