Men behind the Masks.

All the Actors who have played Michael Myers:

Movie 1 :
Nick Castle

Movie 2 :
Dick Warlock Parts

Movies 4 & 6 :
George Wilbur
  
Movie 5 :
Don Shanks

Movie 7 (H20):
Chris Durrand

Movie 8 :
Brad Loree

* Side Notes:

Tony Moran played Myers for the unmasking scene in part 1.

A. Michael Lerner played Myers for the final 15 minutes in the theatrical version of part 6.

All the Actors who have played Jason Voorhees:

Movie 1 :
Ari Lehman

Movie 2 :
Warrington Gillette

Movie 3 :
Richard Brooker

Movie 4 :
Ted White

Movie 5 :
Dick Wieand 
     
Movie 5 :
Tom Morga

Movie 6 :
C.J. Graham

Movie 7, 8, 9, 10 :
Kane Hodder

Freddy Vs Jason :
Ken Kirzinger.

All the Actors who have played Leatherface:

Movie 1 :
Gunnar Hanson

Movie 2 :
Bill Johnson

Movie 3 :
R.A.Milhailoff 

Movie 4 :
Robert Jacks

Movie 2003 remake :
Andrew Bryniarski

All the Actors who have played Pinhead:

Doug Bradley

All the Actors who have played Freddy Krueger:

Robert Englund

*Dawn's Personal Note: AND IT SHOULD STAY THIS WAY!

All the Actors who have palyed Chucky:

(The Voice Of)
Brad Dourif