For the scenes where Steven and Marc interact with each other, rather than have
Oscar Isaac try to act against a green screen stand-in or an extra, Marvel hired Isaac's brother, the journalist-actor Michael Benjamin "Bro Dameron" Hernandez, to serve as his double as a way to help Isaac act opposite himself. Isaac said during a 'Moon Knight' press conference that his brother is the closest thing to him there is on earth. This way, Isaac was able to seamlessly differentiate between the characters and was able to feed off of Hernandez's energy, as if he was acting against himself.
