Original name of the film "American Pie":

East Great Falls High

Source: London Free Press, 8/5/2003

 
   
  Original name of Woody Allen's film "Annie Hall" :

"Anhedonia"
Anhedonia is a psychiatric term meaning the "inability to experience pleasure." Before "Annie Hall" was chosen, Allen's co-screenwriter, Marshall Brickman, suggested "Me and My Goy" and "It Had to Be Jew."
Source: The Observer, 4/13/2003

 
   
  Original title of the film "Deep Throat":

The Sword Swallower

Source: Financial Times (London) , 6/9/2005

 
   
  Original title of the film "E.T" :

"A Boy's Life"

Source: Time, 5/31/1982