Taraji P. HensonKatherine G. Johnson
Octavia SpencerDorothy Vaughan
Janelle MonáeMary Jackson
Kevin CostnerAl Harrison
Kirsten DunstVivian Mitchell
Jim ParsonsPaul Stafford
Mahershala AliJim Johnson
Glen PowellJohn Glenn
Ariana NealJoylette Johnson
Saniyya SidneyConstance Johnson
Zani Jones MbayiseKathy Johnson
Donna BiscoeJoylette Coleman
Olek KrupaKarl Zielinski
Aldis HodgeLevi Jackson
Kimberly QuinnRuth
Frank Hoyt TaylorJudge
Lidya JewettYoung Katherine
Karan KendrickYounger Joylette
Jaiden KaineJoshua Coleman
Kurt KrauseSam Turner
Ken StrunkJim Webb
Selah Kimbro JonesCarolyn Marie Jackson
Tre StokesLevi Jackson Jr.
Corey Mendell ParkerHoward Vaughan
Ashton TylerLeonard Vaughan
Alkoya BrunsonKenneth Vaughan
Ron Clinton SmithWhite Cop
Gregory Alan WilliamsMarion Smithson
Maria HowellMs. Sumner
Arnell PowellProfessor Graves
Crystal Lee BrownBernie
Tequilla WhitfieldEleanor
Dane DavenportAlan Shepard
Evan HoltzmanDeke Slayton
Travis SmithScott Carpenter
Scott Michael MorganBill Calhoun
Chris CavalierIBM Technician
Robert G. McKayPastor Ayres
Rhoda GriffisWhite Librarian
Karen Wheeling ReynoldsCourt Clerk
Kate KneelandCourt Clerk
Joe KnezevichWind Tunnel PA Announcer
Paul RydenTV Reporter at Cape Canaveral
John AtwoodNewscaster
Jon Edwin WrightNewscaster
Wilbur FitzgeraldSenator Patrick
Michael HartsonNight School Professor
Bob JenningsNavy Officer
Gary WeeksReporter at Press Conference
Afemo OmilamiMan Outside Store
Cullen MossMission Control Commander
Amy TiptonWoman Crying
Elijah EverettMan Crying
Andre PushkinRussian Scientist
Randall NewsomeRussian Scientist
Joe Hardy Jr.Gordon Cooper
Howie JohnsonLibrary Security Guard
David KallawayNASA Security Guard
Addison Rose MelfiAddie Marcus
Paige NicolletteEunice (uncredited)