Dee Wallace-Stone .... Mary
Henry Thomas .... Elliot
Peter Coyote .... Keys
Robert MacNaughton .... Michael
Drew Barrymore .... Gertie
K.C. Martel .... Greg
Sean Frye .... Steve
C. Thomas Howell .... Tyler
Erika Eleniak .... Pretty Girl
David M. O'Dell .... Schoolboy
Richard Swingler .... Science Teacher
Frank Toth .... Policeman
Robert Barton .... Ultra Sound Man
Michael Durrell .... Van Man
David Berkson .... Medic

Elliot

Other Movies:Cloak & Dagger (1984), Fire in the Sky (1993), Legends of the Fall (1994) , Suicide Kings (1997), Fever (1999), Gangs of New York (2001), Briar Patch (2001)
TV: Murder One (1988), Psycho IV: The Beginning, Moby Dick (1998), (1991)

Gertie

Other Movies: Altered States (1980), Firestarter (1984), Cat's Eye (1985), Babes in Toyland (1986), Poison Ivy (1992), Wayne's World 2 (1993), Bad Girls (1994), Boys on the Side (1995), Mad Love (1995), Batman Forever (1995), Scream (1996), Wedding Singer(1998), Ever After (1998), Home Fries (1998), Never Been Kissed (1999), Charlie's Angels (2000), Barbarella (2001
TV: Simpsons (1989) , Larry Sanders Show, The (1992), 2000 Malibu Road (1992), Amy Fisher Story (1993), Olive, the Other Reindeer (1999)

Quotes
"Maybe it was an elf, or a leprechaun?"

"Is he a pig? He sure eats like one."

"Beeeeeeeeee!"

"Ellllliiiiiiooootttt."

"Beee Good."

"E.T. phone home."