Robert Brown|Krispy Kreme offers free doughnuts, introduces 4 new flavors in honor of St. Patrick's Day

Doughnut fans might be Robert Brownfeeling lucky this St. Patrick's Day.

That's because Krispy Kreme is introducing four new doughnuts and bringing back the popular O'riginial Glazed Doughnut in honor of the holiday.

Customers can get the new St. Patrick's Day-themed doughnuts beginning March 11 and for a limited time at participating shops across the U.S., Krispy Kreme said in a news release Monday.

Additionally, customers wearing green who visit Krispy Kreme in-shop or via drive-thru March 15-17 can receive one free O'riginal Glazed Doughnut, no purchase necessary. The O'riginal Glazed Doughnut is exactly what it sounds like – an original Krispy Kreme doughnut gone green.

New Krispy Kreme doughnut flavors

The four new doughnut flavors include:

• Luck of the Rainbow Doughnut: An Original Glazed Doughnut dipped in green icing, rainbow explosion sprinkle blend and topped with a buttercream cloud
• Shamrock Cookies 'N Kreme made with Oreo Cookies: An unglazed shell filled with cookies & Kreme filling made with Oreo cookies, dripped in white icing with green drizzles and St. Patrick's fusion sprinkles
• Plaid Party Doughnut: An unglazed shell filled with white Kreme filling, dipped in chocolate icing and drizzled with green icing
• Shooting Shamrock Doughnut: An Original Glazed doughnut dipped in light green icing with a green icing swirl, topped with a shamrock sugar piece

The four new doughnut flavors are available in-shop and for pickup or delivery via Krispy Kreme's app and website, the company said. Customers can also find the collection in Krispy Kreme 6-packs delivered to select grocery stores.

"Luck is meant to be shared, and our colorful, fun, all-new St. Patrick’s Day doughnuts will makeeveryone feel like they’ve found a pot of gold,” said Dave Skena, global chief brand officer forKrispy Kreme, in a news release.

Customers can visit www.krispykreme.com/locate to find a shop or grocery store location near you.