Customers who wear green to any participating Krispy Kreme shop from March 15 to March 17 can score a free original glazed doughnut on the house.

Krispy Kreme is celebrating St. Patrick’s Day with a festive new doughnut collection and a special giveaway. Starting today, participating locations will offer the St. Patrick’s Day Collection, featuring four all-new flavors.

Krispy Kreme is bringing back a fan-favorite doughnut, and fans can get one for free. They’ll have to dress the part, though. Starting Saturday, March 15, anyone wearing green can get a free O’riginal Glazed doughnut at participating Krispy Kreme shops nationwide, according to the Charlotte-based doughnut chain.

Krispy Kreme will also be giving away one free glazed donut on St. Patrick’s Day through March 22 to anyone who walks in or uses the drive-thru by wearing the color green.

Krispy Kreme’s St. Patrick’s Day donuts are here—featuring green glaze, gold sprinkles, and a chance to win free Krispy Kreme doughnuts for a year. Here’s how.

Krispy Kreme launched four new flavors for St. Patrick's Day. Here's how to get a free glazed by wearing green and how to win free doughnuts for a year/

St. Patrick’s Day is right around the corner and Krispy Kreme has big plans. The coffee and doughnut chain is encouraging fans to “Share the Taste O’Luck” with four new festive St. Patrick’s Day doughnuts. Here’s a look at the lineup:

Krispy Kreme on Monday launched an all-new doughnut collection inspired by St. Patrick's Day. Here's a look at the new flavors.

It's hard to argue that Krispy Kreme (NASDAQ: DNUT) doesn't sell tasty treats that consumers love. It's a bit more of a stretch, however, to convince investors that the donut slinger's stock is an attractive investment.