Lifetime has found its Marilyn Monroe. Pan Am alumna Kelli Garner has been cast in the title role in Marilyn, Lifetime’s upcoming four-hour miniseries about the tragic Hollywood icon. She will star opposite Susan Sarandon in the mini, set to premiere in 2015. Based on best-selling book The Secret Life Of Marilyn Monroe by J. Randy Taraborrelli, it will center on Marilyn (Garner), who walks red carpets in shimmering gowns while fighting a battle against demons she’s inherited from her mentally ill mother Gladys (Sarandon), whom she loves, hates and wants desperately to save. Marilyn becomes the Face and Voice of an era, yet wants most of all to be someone’s mother and someone’s little girl.

Marilyn was penned by The Kennedys writer Stephen Kronish. Laurie Collyer is set to direct. Asylum Entertainment is producing. Jonathan Koch, Steven Michaels, Keri Selig and Kronish executive produce. Garner is repped by Gersh and John Carrabino Management.