The trailer for Pirates of the Caribbean: On Stranger Tides premieres on December 13th, but today we have the first footage courtesy of Enterainment Tonight's visit to the set.  The clip is a bit scattershot in focus, but features Johnny Depp hopping across the tops of carriages in a neat set piece, a look at franchise newbie Penelope Cruz in action, and commentary from producer Jerry Bruckheimer among some truly impressive sets built on location in Hawaii and London.

Pirates of the Caribbean: On Stranger Tides -- directed by Rob Marshall -- hits 3D theaters on May 20, 2011.  (Don't worry: it won't be the last.)  Hit the jump to watch the footage.

Johnny Depp returns to his iconic role of Captain Jack Sparrow in an action-packed tale of truth, betrayal, youth and demise.  When Jack crosses paths with a woman from his past (Penelope Cruz), he’s not sure if it’s love—or if she’s a ruthless con artist who’s using him to find the fabled Fountain of Youth. When she forces him aboard the Queen Anne’s Revenge, the ship of the formidable pirate Blackbeard (Ian McShane), Jack finds himself on an unexpected adventure in which he doesn’t know who to fear more:  Blackbeard or the woman from his past.