Star Wars Episode 4: A New Hope - R2-D2: Human or Droid?
Right after the part where R2-D2 gets captured by the Jawas, he gets sent to a room in their car-thingy. Just after he "wakes up", he moves his head, and if you look really carefully, you can see the actor's face in his window.
any version of Star Wars Episode 4
on 06-06-2002 and