比尔·普尔曼
Bill Pullman
饰：总统托马斯·惠特莫尔 President Thomas J. Whitmore
威尔·史密斯
Willard Christopher Smith Jr
饰：队长史蒂芬'史蒂夫'希勒 Captain Steven 'Steve' Hiller
杰夫·高布伦
Jeff Goldblum
饰：大卫·莱文森 David Levinson
玛格丽特·柯林
Margaret Colin
饰：康斯坦斯·斯帕诺 Constance Spano
薇薇卡·福克斯
Vivica A. Fox
饰：茉莉 Jasmine Dubrow
兰迪·奎德
Randy Quaid
饰：罗素·凯斯 Russell Casse
罗伯特·劳吉亚
Robert Loggia
饰：威廉·格雷 General William Grey
詹姆斯·杜瓦尔
James Duval
饰：米格·凯斯 Miguel Casse
利兰·奥瑟
Leland Orser
饰：技术,医疗助理＃ 1 Tech,Medical Assistant #1
汤姆·巴瑞
Thom Barry
饰：SETI技术员＃ 2 SETI Technician #2
罗伯特·派恩
Robert Pine
饰：总参谋长格伦 Chief of Staff Glenn Parness
弗兰克·维尔克
Frank Welker
饰：Special Vocal Effects
贾德·赫希
Judd Hirsch
饰：尤利乌斯 Julius Levinson
詹姆斯·瑞布霍恩
James Rebhorn
饰：艾伯特 Albert Nimzicki
布伦特·斯皮内
Brent Spiner
饰：奥肯博士 Dr. Brackish Okun
罗斯·巴格利
Ross Bagley
饰：迪伦 Dylan Dubrow
比尔·斯米托洛维奇
Bill Smitrovich
饰：中校沃森 Lt. Colonel Watson
梅·惠特曼
Mae Whitman
饰：帕特丽夏 Patricia Whitmore
绮尔斯腾·瓦伦
Kiersten Warren
饰：蒂凡尼 Tiffany
约翰·贝内特·派瑞
Johnathan Bennett Perry
饰：Secret Service Agent
蒂姆·科勒赫
Tim Kelleher
饰：Technician
迈克尔·温瑟
Michael Winther
饰：Co-Worker #3
约翰·卡波迪斯
John Capodice
饰：Mario
格雷格·科林斯
GregCollins
饰：Military Aide
马克·菲特
Mark Fite
饰：Pilot
列万·乌恰涅伊什维利
Леван Учанейшвили
饰：Russian Pilot (as Levani)
克里斯托弗·康纳德
Kristof Konrad
饰：Russian Pilot
兰迪·奥格斯比
Randy Oglesby
饰：Mike Dodge
巴里·德尔·舍曼
Barry Del Sherman
饰：Street Preacher
莎伦泰
Sharon Tay
饰：Reporter
Wendy L. Walsh
饰：Herself
凯文·库尼
Kevin Cooney
饰：Atlantic Air CINC
兰斯·霍华德
Rance Howard
饰：Chaplain
Sayed Badreya
Sayed Badreya
饰：Arab Pilot
Adam Tomei
饰：Sailor
金伯莉·贝克
Kimberly Beck
饰：Housewife
托马斯·F·达菲
Thomas F. Duffy
饰：Lieutenant
吉姆·皮多克
Jim Piddock
饰：Reginald
Frederic W. Barnes
饰：Himself (as Fred Barnes)
Eleanor Clift
饰：Herself
Morton Kondracke
饰：Himself
约翰·麦克劳克林
John McLaughlin
饰：Himself
亚当·鲍德温
Adam Baldwin
饰：Major Mitchell
杰赛普·安德鲁斯
Giuseppe Andrews
饰：Troy Casse
小哈利·康尼克
Harry Connick.Jr.
饰：Captain Jimmy Wilder
小理察·斯贝特
Richard Speight Jr.
饰：Ed
安德鲁·凯加
Andrew Keegan
饰：Older Boy
玛丽·麦克唐纳
Mary McDonnell
饰：First Lady Marilyn Whitmore
哈维·费斯特恩
Harvey Fierstein
饰：Marty Gilbert
莉萨·雅克布
Lisa Jakub
饰：Alicia Casse
弗兰克·诺瓦克
Frank Novak
饰：Teddy
德文·古梅尔萨尔
Devon Gummersall
饰：Philip
米伦·E·威利斯
Mirron E. Willis
饰：Aide
Ross Lacy
饰：Aide
大卫·普雷斯曼
David Pressman
饰：Alex, Aide to President Whitmore
Vivian Palermo
饰：Tech,Medical Assistant #2
拉法埃尔·沙巴拉格
Raphael Sbarge
饰：Commander,Tech
鲍比·霍希
Bobby Hosea
饰：Major Danowitz
丹·劳里亚
Dan Lauria
饰：Commanding Officer
Steve Giannelli
饰：Radar Tech
Eric Paskel
Eric Paskel
饰：Radar Tech
卡洛斯·拉卡马拉
Carlos Lacamara
饰：Radar Operator (as Carlos LaCamara)
Troy Willis
饰：Secret Service Agent
维恩·维尔德森
Wayne Wilderson
饰：Area 51 Technician
杰·阿克沃内
Jay Acovone
饰：Area 51 Guard
James Wong
饰：SETI Technician #1
珍娜·马瑞·霍普
Jana Marie Hupp
饰：SETI Technician #3
Matt Pashkow
饰：Officer #2
Marisa Johnston
饰：Co-Worker #2 (as Marisa Morell)
Dexter Warren
饰：Co-Worker #4
Paul LeClair
饰：Co-Worker #5
Michael Vacca
饰：Lieutenant Peterson (as Capt. Michael 'Chewy' Vacca)
David Chanel
饰：Secret Service Agent
Derek Webster
Derek Webster
饰：Sky Crane Pilot
Eric Neal Newman
饰：Pilot
凯文·西富恩特斯
Kevin Sifuentes
饰：Tank Commander
Elston Ridgle
饰：Soldier
杰克·穆尔
Jack Moore
饰：Stoney Jackson
莱曼·华德
Lyman Ward
饰：Secret Service Agent
Anthony Crivello
饰：Lincoln
Barbara Beck
饰：Monica Soloway
Joe Fowler
饰：Reporter
Andrew Warne
饰：Reporter
皮特·J.卢卡斯
Peter J. Lucas
饰：Russian Reporter (as Peter Jozef Lucas)
Yelena Danova
饰：Russian Newscaster
Johnny Kim
饰：Korean Newscaster (as Derek Kim)
Vanessa J. Wells
饰：Newscaster
Jessika Cardinahl
饰：German Video Newscaster (scenes deleted)
Gary W. Cruz
饰：Video Newscaster
Ron Pitts
饰：Video Newscaster
Christine Devine
饰：Video Newscaster
Ernie Anastos
饰：Rex Black, New York Newscaster
Nelson Mashita
Nelson Mashita
饰：Japanese Tech
Jeff Phillips
饰：B-2 Pilot
John Bradley
John Bradley
饰：Lucas
Jon Shear
Jon Shear
饰：Thomson (as Jon Matthews)
Jerry Dunphy
饰：Himself
杰克·杰伦德
Jack Germond
饰：Himself
巴里·诺兰
Barry Nolan
饰：Himself
George Putnam
饰：Himself
埃里克·迈克尔·徐
Eric Michael Zee
饰：Northridge Field Reporter
Carlos Lara
饰：Farmer Kid
Mike Monteleone
饰：Butler
Lee Strauss
饰：Elvis Fanatic
Lisa Star
饰：Woman on Roof
Malcolm Danare
Malcolm Danare
饰：Intellectual on Roof
Arthur Brooks
饰：Trucker on Roof
Michael Moertl
饰：Thief (as Michael G. Moertl)
James J. Joyce
饰：Master CPO
Joyce Cohen
饰：Kim Peters
Julie Moran
饰：Herself - 'Entertainment Tonight' Reporter
Richard Pachorek
饰：LAPD Helicopter Pilot
迪安·德夫林
Dean Devlin
饰：Eagle 2 Pilot (uncredited)
福尔克·恩格尔
Volker Engel
饰：Man in Office (uncredited)
Jeffrey Gold
饰：German Fighter Pilot (uncredited)
Lincoln D. Hiatt
饰：Colin Barclay (uncredited)
Jonathan Khan
饰：Pilot (uncredited)
Bryan D. Moss
饰：Israeli Fighter Pilot (uncredited)
Roy Newton
饰：Pilot (uncredited)
Gary Pike
Gary Pike
饰：Helicopter Passenger (uncredited)
Bonnie Silco
饰：Bride (uncredited)
Tadao Tomomatsu
饰：Big Hat Guy on Tower (uncredited)
Michael A. Valenzano
饰：Young Pilot (uncredited)
Daren Dochterman
饰：British News Translator (uncredited)
达拉·雷
Darla Rae
饰：Protestor - Omni Hotel (uncredited)
詹姆斯·维斯
James With
饰：British Pilot (uncredited)
Greg Bronson
Greg Bronson
饰：Police Officer at White House (uncredited)
Michael Haddad
饰：Trailer Trash (uncredited)
Darin Mangan
饰：Staff sergeant (uncredited)
Mark Thompson
饰：Video Newscaster
帕特·斯基珀
Pat Skipper
饰：Redneck
Robin Groth
饰：Flagstaff News Anchor
加里·A·赫克
Gary A. Hecker
饰：Alien Vocal Effects (as Gary Hecker)
Jonathan Adler
饰：Secret Service Agent (uncredited)
艾瑞克·阿瓦利
Erick Avari
饰：SETI Chief (uncredited)
Bob Friend
饰：Himself - 'Sky News' Anchorman (uncredited)
Scott McKinley
饰：Joint Chiefs of Staff (uncredited)
奈塔 罗斯
Nectar Rose
饰：Stripper (uncredited)
特雷西·沃特
Tracey Walter
饰：Area 51 Lab Technician (uncredited)
约翰·斯托里
John Storey
卡德罗莎·奥娜·卡罗尔
Kadrolsha Ona Carole
德里克·韦伯斯特
Derek Webster
乔恩·马修斯
Jon Matthews
加里·A·赫克
Gary A. Hecker
饰：演员 Actor/Actress
列万·乌恰尼什维利
Levan Uchaneishvili
饰：Russian Pilot