Chewbacca (Peter Mayhew) being a wicked wookiee
These great captures of actors, directors and crew on set of popular films show them goofing around and blowing off steam in between takes. From Hannibal Lecter eating fries through his mask to the twins from The Shining caught in big smiles, some of these candids catch in-costume actors doing things that seem to be the antithesis of their characters' personalities.
See the entire collection of photos here.
Hannibal Lecter (Anthony Hopkins) is fed a french fry between takes
Back to the Future shot setup
Jurassic Park III raptor "naked" above the waist
Winona Ryder and Johnny Depp on set of Edward Scissorhands
Godzilla practicing an invasion
Gene Wilder and Peter Ostrum, who momentarily swiped Wilder's hat