山姆·夏普德

Sam Shepard

饰：查克·耶格尔 Chuck Yeager

斯科特·格伦

Scott Glenn

饰：Alan Shepard

艾德·哈里斯

Ed Harris

饰：John Glenn

丹尼斯·奎德

Dennis Quaid

饰：Gordon Cooper

弗莱德·沃德

Freddie Joe Ward（本名）

饰：Gus Grissom

芭芭拉·赫希

Barbara Hershey

饰：Glennis Yeager

金·斯坦利

Kim Stanley

饰：Pancho Barnes

维罗尼卡·卡维特

Veronica Cartwright

饰：Betty Grissom

帕梅拉·里德

Pamela Reed

饰：Trudy Cooper

斯科特·帕林

Scott Paulin

饰：Deke Slayton

查尔斯·弗兰克

Charles Frank

饰：Scott Carpenter

兰斯·亨利克森

Lance Henriksen

饰：Wally Schirra

唐纳德·莫法特

Donald Moffat

饰：Lyndon B. Johnson

李翁·赫姆

Levon Helm

饰：Jack Ridley,Narrator

玛丽乔

Mary Jo Deschanel

饰：Annie Glenn

斯科特·威尔森

Scott Wilson

饰：Scott Crossfield

凯西·贝克

Kathy Whitton Baker（本名）

饰：Louise Shepard

Mickey Crocker

Mickey Crocker

饰：Marge Slayton

Susan Kase

Susan Kase

饰：Rene Carpenter

Mittie Smith

Mittie Smith

饰：Jo Schirra

罗亚尔·达诺

Royal Dano

饰：Minister

大卫·柯来龙

David Clennon

饰：Liaison Man

吉姆·海泥

Jim Haynie

饰：Air Force Major

杰夫·高布伦

Jeff Goldblum

饰：Recruiter

Scott Beach

饰：Chief Scientist

Jane Dornacker

Jane Dornacker

饰：Nurse Murch

Anthony Munoz

Anthony Munoz

饰：Gonzales

约翰·P.瑞安

John P. Ryan

饰：Head of Program

Darryl Henriques

Darryl Henriques

饰：Life Reporter

埃里克·塞瓦雷德

Eric Sevareid

饰：Eric Sevareid

威廉姆·拉斯

William Russ

饰：Slick Goodlin

Drew Letchworth

Drew Letchworth

饰：The Permanent Press Corps

Christopher P. Beale

Christopher P. Beale

饰：The Permanent Press Corps

Richard Dupell

Richard Dupell

饰：The Permanent Press Corps

William Hall

William Hall

饰：The Permanent Press Corps

何十塔

John X. Heart

饰：The Permanent Press Corps

Ed Holmes

Ed Holmes

饰：The Permanent Press Corps

Jack Bruno Tate

Jack Bruno Tate

饰：The Permanent Press Corps

爱德华·安哈尔特

Edward Anhalt

饰：Grand Designer

玛丽·阿皮克

Mary Apick

饰：Woman Reporter

Robert Beer

Robert Beer

饰：Dwight D. Eisenhower

Erik Bergmann

Erik Bergmann

饰：Eddie Hodges

James Brady

James Brady

饰：Aide to Lyndon B. Johnson (as James M. Brady)

Katherine Conklin

Katherine Conklin

饰：Woman TV Reporter

Maureen Coyne

Maureen Coyne

饰：Waitress

汤姆·达尔格伦

Tom Dahlgren

饰：Bell Aircraft Executive

John Lion

John Lion

饰：Bell Aircraft Executive

Peggy Davis

Peggy Davis

饰：Sally Rand

约翰·德那

John Dehner

饰：Henry Luce

Robert Elross

Robert Elross

饰：Review Board President

Drew Eschelman

Drew Eschelman

饰：Assistant Scientist

Robert J. Geary

Robert J. Geary

饰：Game Show M.C.

Royce Grones

Royce Grones

饰：1st X-1 Pilot (as Major Royce Grones)

大卫·古皮利

David Gulpilil

饰：Aborigine

Anthony Wallis

Anthony Wallis

饰：Australian Driver (as Anthony Wallace)

Kaaren Lee

Kaaren Lee

饰：Young Widow

Sandy Kronemeyer

Sandy Kronemeyer

饰：Cocoa Beach Girl

Frankie Di

Frankie Di

饰：Cocoa Beach Girl

Michael Pritchard

Michael Pritchard

饰：Texan

Ed Corbett

饰：Texan

肖恩·托马斯

Shaun Thomas

饰：Girl at Pancho's (as O-Lan Shepard)

Mark Todd

Mark Todd

饰：Astronaut Trainee

Allen Gebhardt

Allen Gebhardt

饰：Astronaut Trainee (as Alan Gebhart)

查克·叶格

Chuck Yeager

饰：Fred (as General Chuck Yeager)

Nikolai Bulganin

Nikolai Bulganin

饰：Himself - Viewing Parade for Gagarin (archive footage) (uncredit

Bill Dana

饰：Jose Jimenez (uncredited)

尤里·加加林

Yuri Gagarin

饰：Himself - Embracing Khrushchev (archive footage) (uncredited)

林登·贝恩斯·约翰逊

Lyndon Johnson

饰：Himself - Standing Behind JFK (archive footage) (uncredited)

约翰·肯尼迪

John F. Kennedy

饰：Himself (archive footage) (uncredited)

尼基塔·谢尔盖耶维奇·赫鲁晓夫

Nikita Khrushchev

饰：Himself - Embracing Gagarin (archive footage) (uncredited)

Georgi Malenkov

Georgi Malenkov

饰：Himself - Viewing Parade for Gagarin (archive footage) (uncredit

James Mathers

饰：Capt. Mills (uncredited)

Anastas Mikoyan

Anastas Mikoyan

饰：Himself - Viewing Parade for Gagarin (archive footage) (uncredit

米米·萨奇席恩

Mimi Sarkisian

饰：New Mexiko Nurse in Lobby (uncredited)

埃德·沙利文

Ed Sullivan

饰：Himself (archive footage) (uncredited)

Tony Toscano

Tony Toscano

饰：Reporter (uncredited)

Kliment Voroshilov

Kliment Voroshilov

饰：Himself - Viewing Parade for Gagarin (archive footage) (uncredit

Ed Roboto

Ed Roboto

饰：Recruiter

Gilbert Bazan

Gilbert Bazan

饰：Spectator (uncredited)

Ronnie Dee Blaire

Ronnie Dee Blaire

饰：Voiceover (uncredited)

Christopher Kriesa

Christopher Kriesa

饰：Mission Control Room Man (uncredited)

哈里·谢尔

Harry Shearer

饰：Recruiter

斯科特·格林

Scott Glenn

饰：Alan Shepard

Drew Eshelman

饰：Assistant Scientist