Kelli Garner Marilyn Monroe Actor Susan Sarandon Gladys Baker Actor Emily Watson Grace McKee Actor Jeffrey Dean Morgan Joe DiMaggio Actor Eva Amurri Martino Young Gladys Actor Embeth Davidtz Natasha Lytess Actor Jack Noseworthy Alan DeShields Actor Stephen Bogaert Arthur Miller Actor Giacomo Gianniotti Jimmy Dougherty Actor Peter MacNeill Joseph M. Schenck Actor Barry Flatman Darryl F. Zanuck Actor Matthew Bennett Allan 'Whitey' Snyder Actor Tony Nardi Johnny Hyde Actor Tamara Hickey Patricia Kennedy Lawford Actor Ella Allan Norma Jeane Actor Mia Allan Norma Jeane Actor Jonathan Koch Executive Producer Steven Michaels Executive Producer Keri Selig Executive Producer Stephen Kronish Executive Producer, Writer Laurie Collyer Director Joseph Boccia Producer Don Carmody Producer David Cormican Producer