Cast as of 4/18/20
Note: Up to date cast info now available on the imdb page
https://www.imdb.com/title/tt1831804/
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James Marsden -- Stu Redman
Jovan Adepo -- Larry Underwood
Whoopi Goldberg -- Mother Abagail
Amber Heard -- Nadine Cross
Brad William Henke -- Tom Cullen
Katherine McNamara -- Julie Lawry
Daniel Sunjata -- Cobb
Owen Teague -- Harold Lauder
Nat Wolff -- Lloyd Henreid
Odessa Young -- Frannie Goldsmith
Henry Zaga -- Nick Andros
Olivia Cheng -- Dr. Sylvia Wen
Nicholas Lea -- Norris
Arkie Kandola -- Foreman
Seth Whittaker -- Burly Guard #2
Jennifer-Juniper Angeli -- Harold's Mom
Eion Bailey -- Teddy Weizak
Curtis Braconnier -- ?
Lloyd Cunningham -- Phoenix Guard
Spencer Drever -- Younger Brother
Heather Graham -- Rita Blakemoor
Ian Hawes -- Plague Victim
Greg Kinnear -- Glen Bateman
Moire Kiyingi -- Abagail's Mother
M.J. Kokolis -- Older Brother
Hamish Linklater -- Dr. Ellis
Todd Matthews -- Julie's Cameraman
Troy Mundle -- Ralph Hodges
Alexander Skarsgård -- Randall Flagg
Jesse Stanley -- Amy Lauder
J. Douglas Stewart -- Hap
Lisa Chandler -- Susan (Stern?)
Brandyn Eddy -- Vince Hogan
Shishy Gebru -- Hipster
Tarun Keram -- Steve
Ariana Nica -- Adorable child
Iris Paluly -- Female Patient Stage
Lisa Renee Pitts -- Alice Underwood
Michel Issa Rubio -- Stalker
Carolyn Tinglin -- Trauma Nurse
Nicholas Dohy -- Boulder Citizen (uncredited)
Pam McCartney -- Hurt Gladiator (uncredited)