Jack Nicholson character President James Dale / Art Land
Glenn Close character First Lady Marsha Dale
Annette Bening character Barbara Land
Pierce Brosnan character Professor Donald Kessler
Danny DeVito character Rude Gambler
Martin Short character Press Secretary Jerry Ross
Sarah Jessica Parker character Nathalie Lake
Michael J. Fox character Jason Stone
Rod Steiger character General Decker
Tom Jones character Himself
Lukas Haas character Richie Norris
Natalie Portman character Taffy Dale
Jim Brown character Byron Williams
Lisa Marie character Martian Girl
Sylvia Sidney character Grandma Florence Norris
Jack Black character Billy Glenn Norris
Pam Grier character Louise Williams
Joe Don Baker character Richie's Dad
O-Lan Jones character Sue Ann Norris
Christina Applegate character Sharona
Joseph Moynihan character Stranger
Tommy Bush character Hillbilly
Brandon Hammond character Neville Williams
Frank Welker character Various Martians (voice)
Ray J character Brandon Williams
Rance Howard character Texan Investor
Gloria M. Malgarini character Nun
