Bill Pullman as Self

Will Smith as Self

Jeff Goldblum as Self

Margaret Colin as Self / White House Press Secretary Constance Spano

Robert Loggia as Self / U.S. Space Command General Grey

Vivica A. Fox as Self

Mary McDonnell as Self

Harry Connick Jr. as Self

Dean Devlin as Self

Roland Emmerich as Self

Barry Nolan as Self / WNN News Anchor Barry Nolan

Robert D. McKenzie as Self - Retired Captain, United States Navy

Whitley Strieber as Self - Author, 'Communion'

Michael Lindemann as Self - Institute for the Study of Contact w/Non-Human Intel.

John F. Schuessler as Self - Aerospace Engineer

Don Berliner as Self - Chairman, Fund for UFO Research

James W. Canan as Self - Writer & Retired Military Intelligence

Don Ecker as Self - Director of Research, UFO Magazine

Hans Holzer as Self - Professor, Ph.D., Author

Bruce Maccabee as Self - Physicist, Strategic Defense Initiative

Oleg Kalugin as Self - Former KGB General

Robert M. Wood as Self - Ph.D., Mutual UFO Network

Bret Lewis as WNN's White House Correspondent Bret Lewis

Barbara Beck as WNN Reporter Monica Soloway, Andrews Air Force Base

Ernie Anastos as WNN's New York City Correspondent Ernie Anastos

Jerry Dunphy as WNN's Pentagon Correspondent Jerry Dunphy

Lincoln D. Hiatt as WNN Reporter Colin Barclay in Hyattsville, Maryland

Wendy L. Walsh as WNN Reporter Wendy Walsh, Los Angeles

Ronald Reagan as Self (archive footage)