Will Smith ( Will Smith )

Capt. Steven Hiller

Bill Pullman ( Bill Pullman )

President Thomas J. Whitmore

Jeff Goldblum ( Jeff Goldblum )

David Levinson

Mary McDonnell ( Mary McDonnell )

Marilyn Whitmore

Judd Hirsch ( Judd Hirsch )

Julius Levinson

Robert Loggia ( Robert Loggia )

General William Grey

Randy Quaid ( Randy Quaid )

Russell Casse

Margaret Colin ( Margaret Colin )

Constance Spano

James Rebhorn ( James Rebhorn )

Albert Nimzicki

Harvey Fierstein ( Harvey Fierstein )

Marty Gilbert

Adam Baldwin ( Adam Baldwin )

Major Mitchell

Brent Spiner ( Brent Spiner )

Dr. Brackish Okun

James Duval ( James Duval )

Miguel

Vivica A. Fox ( Vivica A. Fox )

Jasmine Dubrow

Lisa Jakub ( Lisa Jakub )

Alicia

Ross Bagley ( Ross Bagley )

Dylan

Mae Whitman ( Mae Whitman )

Patricia Whitmore

Bill Smitrovich ( Bill Smitrovich )

Captain Watson

Kiersten Warren ( Kiersten Warren )

Tiffany

Harry Connick Jr. ( Harry Connick Jr. )

Capt. Jimmy Wilder

Giuseppe Andrews ( Giuseppe Andrews )

Troy

John Storey ( John Storey )

Dr. Isaacs

Frank Novak ( Frank Novak )

Teddy

Devon Gummersall ( Devon Gummersall )

Philip

Leland Orser ( Leland Orser )

Techy / Med Asst #1

Mirron E. Willis ( Mirron E. Willis )

Aide

Ross Lacy ( Ross Lacy )

Aide

David Pressman ( David Pressman )

Whitmore's Aide

Vivian Palermo ( Vivian Palermo )

Tech / Med Asst

Raphael Sbarge ( Raphael Sbarge )

Commander / Tech

Bobby Hosea ( Bobby Hosea )

Commanding Officer

Dan Lauria ( Dan Lauria )

Commanding Officer

Steve Giannelli ( Steve Giannelli )

Radar Tech

Eric Paskel ( Eric Paskel )

Radar Tech

Carlos Lacámara ( Carlos Lacámara )

Radar Operator

John Bennett Perry ( John Bennett Perry )

Secret Serviceman

Troy Willis ( Troy Willis )

Secret Serviceman

Tim Kelleher ( Tim Kelleher )

Technician

Wayne Wilderson ( Wayne Wilderson )

Area 51 Technician

Jay Acovone ( Jay Acovone )

Area 51 Guard

James Wong ( James Wong )

SETI Tech One

Thom Barry ( Thom Barry )

SETI Tech Two

Jana Marie Hupp ( Jana Marie Hupp )

SETI Tech Three

Matt Pashkow ( Matt Pashkow )

Second Officer

Robert Pine ( Robert Pine )

Chief of Staff

Marisa Johnston ( Marisa Johnston )

Co-Worker #2

Michael Winther ( Michael Winther )

Co-Worker #3

Warren Dexter Beatty ( Warren Dexter Beatty )

Co-Worker #4

Paul LeClair ( Paul LeClair )

Co-Worker #5

Michael Vacca ( Michael Vacca )

Lt. Peterson

David Channell ( David Channell )

Secret Service Agent

John Capodice ( John Capodice )

Mario

Greg Collins ( Greg Collins )

Military Aide

Derek Webster ( Derek Webster )

Sky Crane Pilot

Mark Fite ( Mark Fite )

Pilot

Eric Neal Newman ( Eric Neal Newman )

Pilot

Levan Uchaneishvili ( Levan Uchaneishvili )

Russian Pilot

Kristof Konrad ( Kristof Konrad )

Russian Pilot

Kevin Sifuentes ( Kevin Sifuentes )

Tank Commander

Elston Ridgle ( Elston Ridgle )

Soldier

Randy Oglesby ( Randy Oglesby )

Mechanic

Jack Moore ( Jack Moore )

Mechanic

Barry Del Sherman ( Barry Del Sherman )

Street Preacher

Lyman Ward ( Lyman Ward )

Secret Service Guy

Anthony Crivello ( Anthony Crivello )

Lincoln

Richard Speight Jr. ( Richard Speight Jr. )

Ed

Barbara Beck ( Barbara Beck )

Monica Soloway

Joe Fowler ( Joe Fowler )

Reporter

Andrew Warner ( Andrew Warner )

Reporter

Sharon Tay ( Sharon Tay )

Reporter

Peter J. Lucas ( Peter J. Lucas )

Russian Reporter

Yelena Danova ( Yelena Danova )

Russian Newscaster

Johnny Kim ( Johnny Kim )

Korean Newscaster

Vanessa J. Wells ( Vanessa J. Wells )

Newscaster

Jessika Cardinahl ( Jessika Cardinahl )

German Video Newscaster

Gary W. Cruz ( Gary W. Cruz )

Video Newscaster

Ron Pitts ( Ron Pitts )

Video Newscaster

Wendy L. Walsh ( Wendy L. Walsh )

Video Newscaster

Christine Devine ( Christine Devine )

Video Newscaster

Mark Thompson ( Mark Thompson )

Video Newscaster

Ernie Anastos ( Ernie Anastos )

Rex Black / NY Newscaster

Kevin Cooney ( Kevin Cooney )

Atlantic Air CINC

Rance Howard ( Rance Howard )

Chaplain

Nelson Mashita ( Nelson Mashita )

Japanese Tech

Jeff Phillips ( Jeff Phillips )

B-2 Pilot

Sayed Badreya ( Sayed Badreya )

Arab Pilot

Adam Tomei ( Adam Tomei )

Sailor

John Bradley ( John Bradley )

Lucas

Kimberly Beck ( Kimberly Beck )

Housewife

Thomas F. Duffy ( Thomas F. Duffy )

Lieutenant

Andrew Keegan ( Andrew Keegan )

Older Boy

Jon Matthews ( Jon Matthews )

Thomson

Jim Piddock ( Jim Piddock )

Reginald

Frederic W. Barnes ( Frederic W. Barnes )

Self

Eleanor Clift ( Eleanor Clift )

Self

Jerry Dunphy ( Jerry Dunphy )

Self

Jack Germond ( Jack Germond )

Self

Morton Kondracke ( Morton Kondracke )

Self

John McLaughlin ( John McLaughlin )

Himself

Barry Nolan ( Barry Nolan )

Self

George Putnam ( George Putnam )

Self

Eric Michael Zee ( Eric Michael Zee )

Northridge Field Reporter

Pat Skipper ( Pat Skipper )

Redneck

Carlos Lara ( Carlos Lara )

Farmer Kid

Mike Monteleone ( Mike Monteleone )

Butler

Lee Strauss ( Lee Strauss )

Elvis Fanatic

Lisa Star ( Lisa Star )

Woman on Roof

Malcolm Danare ( Malcolm Danare )

Intellectual on Roof

Arthur Brooks ( Arthur Brooks )

Trucker on Roof

Michael Moertl ( Michael Moertl )

Thief

James J. Joyce ( James J. Joyce )

Master C. P. O.

Joyce Cohen ( Joyce Cohen )

Kim Peters (Reporter)

Julie Moran ( Julie Moran )

Entertainment Tonight Reporter

Robin Groth ( Robin Groth )

Flagstaff News Anchor

Richard Pachorek ( Richard Pachorek )

LAPD Helicopter Pilot

Dakota ( Dakota )

Boomer

Gary A. Hecker ( Gary A. Hecker )

Alien Vocal Effects (voice)

Frank Welker ( Frank Welker )

Special Vocal Effects (voice)

Erick Avari ( Erick Avari )