Richard Dreyfuss

Roy Neary

François Truffaut

Claude Lacombe

Teri Garr

Ronnie Neary

Melinda Dillon

Jillian Guiler

Bob Balaban

David Laughlin

J. Patrick McNamara

Project Leader

Warren J. Kemmerling

Wild Bill

Roberts Blossom

Farmer

Cary Guffey

Barry Guiler

Lance Henriksen

Robert

Gene Dynarski

Ike

Carl Weathers

Military Policeman

Norman Bartold

Norman Bartold

F.J. O'Neil

ARP Project Member

Matthew Robbins

Returnee #3 Flt. 19

Luis Contreras

Federale

John Dennis Johnston

Special Forces

George DiCenzo

Major Benchley

Alexander Lockwood

Implantee

Josef Sommer

Larry Butler

Bill Thurman

Air Traffic

James Keane

Radio Telescope Team

Basil Hoffman

Longly (uncredited)

J. Allen Hynek

Man Smoking Pipe at Landing Site (uncredited)