Ana de ArmasNorma Jeane / Marilyn Monroe
Adrien BrodyThe Playwright
Bobby CannavaleThe Ex-Athlete
Lucy DeVitoEx-Athlete's Niece
Scoot McNairyTommy Ewell / Richard Sherman
Xavier SamuelCass Chaplin
Caspar PhillipsonThe President
Evan WilliamsEddy G. Robinson Jr.
Haley WebbBrooke (Flight Attendant)
Tygh RunyanNorma Jeane's Father
Michael MasiniTony Curtis / Josephine
Chris LemmonJack Lemmon / Daphne
Sonny ValicentiCasting Director
Ravil IsyanovBilly Wilder
Rob BrownsteinActing Coach
Ethan CohnAssistant to the Director
Christopher KriesaJoe E. Brown
Eric MathenyJoseph Cotten
Kiva JumpWard Nurse at Norwalk
Patrick BrennanJoe (Photo Shoot Photographer)
Vanessa LemonidesMarilyn Singing Voice (voice)
Michael DrayerDeputy Will Bonnie
Ron WestDr. Spindel (Abortion Doctor)
Scott WilderChloroform Man #1
Sal LandiChloroform Man #2
Seth Meriwether5th Helena Messenger
Darrin M. SchlieAssistant Camera Man
Julián RebolledoTrailer Announcer / Newsreel Announcer
Tereza RizzardiEx-Athlete's Momma
Lily FisherYoung Norma Jeane
Spencer TaylorAssistant Director
Denna ThomsenChoreographer
Parker HarrisDiamonds Dancer
Ryan KanferDiamonds Dancer
Scott HislopDiamonds Dancer
Parker BlakelyDiamonds Dancer
Chris MossDiamonds Dancer
Cris CangeroDiamonds Dancer
Brandon BeltranDiamonds Dancer
Patrick EllisDiamonds Dancer
Luke KamppilaDiamonds Dancer
Richard BigliaDiamonds Dancer
Arne GjeltenDiamonds Dancer
Russell RidgewayDiamonds Dancer
Jake BrandorffDiamonds Dancer
Bryan AnthonyDiamonds Dancer
Jeremy ShouldisTuxedo #2 (uncredited)
Steve BannosBrentwood Doctor (uncredited)
Dieterich GrayPhotographer's Assistant (uncredited)
Mia McGovern ZainiYoung Norma Jeane (voice) (uncredited)
Garret DillahuntProducer (uncredited)
Eden RiegelEsther (uncredited)
Judy KainSevere Woman (uncredited)