Ever wonder what you would look like in a Star Fleet uniform? Or maybe as a Swashbuckler? Or how about a character from a German beer hall?

Now you can try on more than 200 costume combinations from Buy Costumes with their new iCostumes app. The app is a free download.

iCostumes uses a proprietary “morphing technology” that allows you to place your own face (or the face of a friend or even a public figure) in a huge variety of costume combinations. Then you can save your creation to a photo album or share it with friends on Facebook, Twitter or email.

The free app is compatible with your iPhone, iPod Touch and iPad. All of the products you would need to create the iCostumes combinations in real life are available for sale on BuyCostumes.com, the world’s largest Internet retailer of costumes and Halloween products. Don’t forget that if you decide to make a purchase, you’ll save 12% by using a coupon code.

According to Jalem Getz, CEO of BuyCostumes, the app is"“fun, and it actually works, it doesn't look like cut and paste, you could fool just about anyone."

In addition to selecting a ready-made costume, users can “bling it out” by adding accessories to create one of a kind, outrageous combinations. You can also use the iCostumes app to make a Halloween costume recommendation for your friends by dressing them up and sending the result to them through Facebook or Twitter.

From Zombie, to French Maid, to Disco Dude or Diva, the iCostumes app is a fun way to dress up (virtually) for the season, and also to help you decide on your real-life costume this year.

I wonder how the boss would look as a Mariachi Vampire?