Celebrity trainers and brothers Ryan and Eric Johnson break down how they train actors for specific roles, including Scarlett Johansson for 'Ghost in the Shell,' Olivia Cooke for 'Ready Player One,' Seann William Scott for 'Goon: Last of the Enforcers' and Ben Platt for 'The Politician.'

Ryan and Eric Johnson's gym: HOMAGE @ The Alyn at 152 East 87th St