In 2012–13, he played Cassius in Greg Doran's Royal Shakespeare Company production of Julius Caesar in Stratford upon Avon, London and New York, where in his New York Times review Ben Brantley said of Nri, "Mr. Nri's expression as he registers Caesar's words is that of a man who feels a noose tightening around his neck. Wary and sly, scared and manipulative, Mr. Nri is an excellent Cassius, capturing the climate of paranoia and politicking that thickens the air."