Actress Reese Witherspoon, who recently discovered her Irish roots through Ancestry DNA testing, was shocked but happy to find that she was 63 percent Irish.

The 41-year-old revealed the news to host Conan O’Brien’s on his late-night talk show, Conan.

“I called your producer on the way here in the car because I was very excited,” she said on the show.

“I did one of those genetic testing things and I found out that I’m 63 percent Irish.

“I had no idea. I had no idea! I thought I was Scottish and Welsh. It turns out my parents are just full of s--t, I guess. But now I’m Irish!

#Conan tonight, y’all! I might have something to say ... 😉⭐️ @teamcoco @tbsnetwork

A post shared by Reese Witherspoon (@reesewitherspoon) on

The Oscar winner then proceeded to make some cringe-inducing stereotypical Irish jokes.

“It just makes so much sense, I’m a really good drinker. I love St. Patrick’s Day. Potatoes are delicious. I’m looking forward to meeting all my cousins.”

Taking on a rather bad Irish accent, she said: “Now I get to say things like, ‘It’s in me genes! I love that Conan’ O’Brien; he’s such a nice fella.’”

She even joked to Conan about his resemblance to a certain Irish symbol.

She said: “You’re kind of like a giant leprechaun.”

The Irish American actress was on the show to promote her upcoming film A Wrinkle in Time.

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H/T: Irish Mirror

Reese Witherspoon revealed her Irish heritage on TBS' 'Conan.'YouTube