Is Jason Momoa Irish? The Norwalk alum stars in a Guinness ad ahead of St. Patrick's Day.

Jason Momoa discovered he’s got some Irish in him in a new Guinness ad ahead of St. Patrick’s Day.

The Norwalk High School alum co-directed and starred in an ad for the popular Irish beer brand released before the holiday, which is March 17.

In the ad, the “Aquaman” and “Dune” star opens up what appeared to be the results of a genetic ancestry test. Just a moment into reading the results, Momoa shrieks and launches himself out of his chair.

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The Hollywood actor playfully shows off his action skills, dashing through streets and crowds and sliding across the hood of a car, not once letting go of the paper with the results.

Finally, Momoa bursts into a bar and announces to a crowded room, “I’m f------ Irish!”

The kicker?

He’s only 2%.

Is Jason Momoa really Irish?

Momoa was born in Honolulu, Hawaii, and has long shown off his pride for his heritage.

But is he Irish?

Yes, and “probably a little more” than 2%, he told People Magazine, citing his mom, Coni, and his grandma's family ancestry.

Where did Jason Momoa grow up?

The “Fast X” actor was raised in Norwalk and took courses in marine biology at Central Campus in Des Moines. In recent years, Momoa's visits to Iowa have led to stops at Waveland Cafe, Tasty Tacos and West End Architectural Salvage.

More: Want to spend a day in Iowa like Jason Momoa? Here's where to go, what to do

When is St. Patrick’s Day?

Get your green on when Sunday, March 17, rolls around. The holiday celebrates the patron saint of Ireland on the day he was believed to have died.

More: Parade, brunch and booze. Here are 11 ways to celebrate St. Patrick's Day in Des Moines

Watch Jason Momoa learn he’s Irish in Guinness ad

See the movie star show he’s just as capable behind the camera as he is on camera in Guinness’ ad.

Paris Barraza is a trending and general assignment reporter at the Des Moines Register. Reach her at [email protected]. Follow her on Twitter @ParisBarraza.

This article originally appeared on Des Moines Register: Jason Momoa discovers Irish ancestry in St. Patrick's Day Guinness ad