Although jack sparrow may be the Captain of the Black Pearl in disney's pirates of the caribbean: At World's End, were it not for the loyal Will Turner, he might still be in the belly of the Kraken. A Captain in his own right (although not necessarily by voluntary means) of The Flying Dutchman, Will is a worthy costuming choice.
Dress as the former blacksmith and son of the pirate, Bootstrap Bill Turner with a white peasant shirt, black lace-up vest and pants.
To make this look even more convincing, you may want to accessorize the costume with boot covers, perfect for wading the depths of the angry sea and a wig to simulate Will's lustrous (yet rather manly) locks. Play up Will's pirate heritage and pick up a swashbuckling pirate sword to accompany you on your next costume party adventure!