- as Katherine Johnson
- as Dorothy Vaughan
- as Mary Jackson
- as Al Harrison
- as Vivian Michael
- as Paul Stafford
- as Jim Johnson
- as Levi Jackson
- as John Glenn
- as Ruth
- as Karl Zielinski
- as Sam Turner
- as Jim Webb
- as Young Katherine Coleman
- as Mrs. Joylette Coleman
- as Joylette Johnson
- as Constance Johnson
- as Howard Vaughan
- as Leonard Vaughan
- as Kenneth Vaughn
- as Younger Joylette Coleman
- as Joshua Coleman
- as Marion Smithson
- as Ms. Sumner
- as Professor Graves
- as White Cop
- as Bernie
- as Eleanor
- as Alan Shepard
- as Scott Carpenter
- as Bill Calhoun
- as Pastor Ayres
- as White Librarian
- as Court Clerk
- as Court Clerk
- as Wind Tunnel PA Announcer
- as Judge
- as Newscaster
- as Newscaster
- as Senator Patrick
- as Night School Professor
- as Navy Officer
- as Reporter at Press Conference
- as Man Outside Store
- as Mission Control Commander
- as Russian Scientist
- as Library Security Guard
- as NASA Security Guard
- as Himself (Archive footage)
- as Himself (Archive footage)
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