Lifetime once again brings to life the story of a very famous deceased person with its new miniseries event, The Secret Life of Marilyn Monroe. Starring Kelli Garner as Marilyn, Academy Award winner Susan Sarandon as Marilyn's mother Gladys, Jeffrey Dean Morgan as Joe DiMaggio, and Golden Globe nominee Emily Watson as Grace, the miniseries debuts Saturday, May 30 at 8:00 pm ET/PT, and continues on Sunday, May 31 at 8:00 pm ET/PT.