It's March 17th, and that means it's St. Patrick's Day! Other than pouring yourself a pint of Guinness, heading out to a pub, or chowing down on some delicious Irish Potatoes (either the real ones or the candy ones), there's one more important tradition: Wearing green. 

If you're spotted without a stitch of green on on St. Paddy's Day, you're liable to get pinched - and we don't want some of our favorite celebs getting pinched! So even if they forgot to wear green today, we hope this post will ward off any leprechauns that are around looking for green-less citizens.

Here's 20 pictures of celebrities wearing green. Happy St. Patrick's Day!