We keep hearing all sorts of rumors and supposed leaks from the set of Star Wars: Episode VII. Now this anti-spoiler propaganda poster has appeared the film's set as a jocular warning: spoil this movie and we'll sic Vader on you.

Frank Marshall, filmmaker and husband of Lucasfilm president Kathleen Kennedy, snapped this photo at Pinewood Studios, where parts of Episode VII are currently being filmed:

The poster itself is nothing new. Artist Cliff Chiang made it a while back as part of a series of Star Wars propaganda and pulp illustrations. But its presence on the Pinewoods set serves as an amusing reminder to the visitors and crew to keep the movie's secrets off the Internet.

[via Comic Book Movie]