Chuck Yeager
Alan Shepard
John Glenn
Gordon Cooper
Gus Grissom
Glennis Yeager
Pancho Barnes
Betty Grissom
Trudy Cooper
Deke Slayton
Scott Carpenter
Wally Schirra
Lyndon B. Johnson
Jack Ridley / Narrator
Annie Glenn
Scott Crossfield
Louise Shepard
Marge Slayton
Rene Carpenter
Jo Schirra
Minister
Liaison Man
Air Force Major
Recruiter
Chief Scientist
Nurse Murch
Gonzales (as Anthony Munoz)
Head of Program
Life Reporter
Eric Sevareid
Slick Goodlin
The Permanent Press Corps
Grand Designer
Woman Reporter
Dwight D. Eisenhower
Eddie Hodges
Aide to Lyndon B. Johnson (as James M. Brady)
Woman TV Reporter
Waitress
Bell Aircraft Executive
Sally Rand
Henry Luce
Review Board President
Assistant Scientist
Game Show M.C.
1st X-1 Pilot (as Major Royce Grones)
Aborigine
Australian Driver (as Anthony Wallace)
Young Widow
Cocoa Beach Girl
Texan
Texan (as Ed Corbett)
Girl at Pancho's (as O-Lan Shepard)
Astronaut Trainee
Astronaut Trainee (as Alan Gebhart)
Fred (as General Chuck Yeager)
Self (archive footage)
Spectator (uncredited)
NYPD Patrolman (uncredited)
Voiceover (uncredited)
Self - Viewing Parade for Gagarin (archive footage) (uncredited)
José Jimenez (archive footage) (uncredited)
Woman in Audience (uncredited)
Self (uncredited)
Fan at Cow Palace (uncredited)
Self - Embracing Khrushchev (archive footage) (uncredited)
Self - Standing Behind JFK (archive footage) (uncredited)
Self (archive footage) (uncredited)
Self - Embracing Gagarin (archive footage) (uncredited)
Mission Control Room Man (uncredited)
Capt. Mills (uncredited)
Student Pilot (uncredited)
Reporter (uncredited)
New Mexico Nurse in Lobby (uncredited)
Hero Extra (uncredited)
Party Guest (uncredited)
Diaper Man (uncredited)