On St. Patrick's Day, some people count four-leaf clovers. We're counting sexy Irish celebrities in Hollywood and beyond. Enjoy!

Colin O'Donoghue

Even with just one hand, Once Upon a Time's Captain Hook can still get it.

Niall Horan

The One Direction hunk hails from Mullingar, a small town in County Westmeath. Since the band's breakup he's occupied himself with other musical projects and released his first solo studio album, Flicker, which hit Number One in both the U.S. and Ireland.

Aidan Turner

We first fell under Turner's spell when he played a vampire in the original U.K. version of Being Human. But it was his starring role on Poldark that revealed his, ahem, true gifts.

There was even talk of Turner taking on the mantle of 007. Oh, Aidan.

Gavan Hennigan

This 37-year-old extreme environment athlete has competed in snowboarding, mountaineering, ultra-running, and even rowed across the Atlantic in a row boat. Even more impressive, he overcame drug and alcohol addiction in his 20s to be his authentic self.

“I was afraid to admit I was gay," Hennigan told The Irish Times. "It was only when I hit rock bottom that I could look up and try to deal with it. I just felt I did not fit in and I had so many anger issues. I don’t particularly identify as a gay role model but if one person can see that I have survived all that, it will be worth it."

Jack Reynor

The Dublin native was shortlisted as a contender for May 2018's Solo: A Star Wars Story. His past work includes Transformers: Age of Extinction and the latest adaptation of Macbeth, co-starring Oscar nominees Michael Fassbender and Marion Cotillard.

Allen Leech

Originally from Killiney County in Dublin, Leech is most famous for his role as Tom Branson on Downton Abbey, and also had a role in the Academy Award winning film The Imitation Game.

Chris O’Dowd

What’s sexier than a guy who can make you laugh? In Bridesmaids, Chris O’Dowd showed the world that he looks adorable in a cop uniform.

Pierce Brosnan

Bond to the bone.

Domhnall Gleeson

The ubiquitous Irish actor has starred in everything from Brooklyn and Ex Machina to Star Wars: The Force Awakens and Darren Aronofsky's psychological horror film Mother.

Colin Farrell

This Irish actor has a foul mouth, a bad attitude, and a notorious sex tape. What's not to love?

Jamie Dornan

Jamie Dornan seems uncomfortable embracing the sex symbol status that Fifty Shades has brought him. And that makes him all the more appealing.

Michael Fassbender

There’s sexy and then there’s Fassbender: He showed a magnetic personality in the X-Men movies, showed off his physique in Assassin's Creed. and wasn't afraid to put it ALL out there in Shame.

Jon Adams and Samantha Manzella contributed to this feature.