Today, Yahoo! released the official theatrical trailer for 'Pirates of the Caribbean: On Stranger Tides,' the fourth installment in Disney's mega-popular movie franchise.

The new trailer includes footage of Capt. Jack Sparrow (Johnny Depp) on his quest to find the Fountain of Youth, as well as scenes with 'Pirates' newbies Penelope Cruz, who plays the seductive Angelica, a woman from Jack's past, and Ian McShane, as the villainous pirate Blackbeard.

In addition to Capt. Jack, 'On Stranger Tides' will also see the return of a few familiar faces, including Keith Richards, as Jack's father, and Geoffrey Rush, as Barbossa.

'Pirates of the Caribbean: On Stranger Tides' sails into theaters nationwide on May 20, 2011.

[Yahoo! Movies]