Model-actress Laura Harrier has joined the cast of Steve McQueen’s HBO drama “Codes of Conduct.”

“Codes of Conduct” revolves around Beverly Snow, a young man played by newcomer Devon Terrell, who enters New York high society but has a past that may not be what it seems.

Paul Dano is also part of the cast.

HBO recently gave a six-episode limited series order to the drama that McQueen and Matthew Michael Carnahan are co-writing. The two are also exec producing with Iain Canning, Emile Sherman and Russell Simmons. McQueen will direct the pilot.

Past credits for Harrier, who is repped by ICM Partners and Soffer/Namoff Entertainment, include “The Last Five Years” and the TV drama “Unforgettable.”