The original Karate Kid himself, Ralph Macchio, has signed on to Hitchcock And The Making Of Psycho. Macchio will play Psycho screenwriter Joe Stefano. Anthony Hopkins plays Hitchcock, Helen Mirren plays Alma Reville, Scarlett Johansson plays Janet Leigh, and Jessica Biehl plays Vera Miles. The Sacha Gervasi-directed adaptation of the Stephen Rebello book is just getting underway through Montecito Picture Co and Fox Searchlight. Macchio just completed a role in Happily Divorced.