Clint Eastwood as Frank Corvin

Tommy Lee Jones as Hawk Hawkins

Donald Sutherland as Jerry O'Neill

James Garner as Tank Sullivan

James Cromwell as Bob Gerson

Marcia Gay Harden as Sara Holland

William Devane as Eugene Davis

Loren Dean as Ethan Glance

Courtney B. Vance as Roger Hines

Barbara Babcock as Barbara Corvin

Rade Šerbedžija as General Vostov

Blair Brown as Dr. Anne Caruthers

James MacDonald as Capcom

Jon Hamm as Young Pilot #2

Toby Stephens as Young Frank

Anne Stedman as Jason's Girlfriend

Jay Leno as Jay Leno

Nils Allen Stewart as Tiny

Eli Craig as Young Hawk

John Asher as Young Jerry

Matt McColm as Young Tank

Billie Worley as Young Gerson

Mark Thomason as Mission Control Tech

Georgia Emelin as Jerry's Girlfriend

Rick Scarry as State Department Official

Tim Halligan as Qualls

Steve Monroe as Waiter

Gordy Owens as Simsupe

Kate McNeil as Female Astronaut #1

Karen M. Waldron as Female Astronaut #2

John Linton as Male Astronaut #1

Paul Pender as JBC Security Guard

Steven West as Construction Tech

Cooper Huckabee as Trajectory Engineer

Hayden Tank as Boy at NASA Tour

Gerald Emerick as T-38 Pilot

Renee Olstead as Little Girl

Don Michaelson as NASA Doctor

Steve Stapenhorst as Vice President

Lauren Cohn as Teacher at NASA Tour

Chris Wylde as Jason

Erica Grant as Female Engineer

Kristin Quick as Young Museum Attendant

Deborah Jolly as Cocktail Waitress