Conan O'Brien's DNA test results are frankly a feat of human genetics

His doctor had never seen anything like it.
 By 
Rachel Thompson
 on 
Conan O'Brien's DNA test results are frankly a feat of human genetics
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You know you're something special when a doctor tells you they've not seen anything quite like you before.

That's what Conan O'Brien was told by his doctor when he went for a physical and ended up getting a DNA test. The results? Well, turns out he's even more Irish than actual Irish folk living in Ireland.

"So, he took a DNA sample and I left, two weeks later he called me up and he said, 'I've never, ever, ever had a DNA result like this before and I've been doing this for 10 years,'" O'Brien told Stephen Colbert.

"'You are 100 percent Irish,'" the doctor told him. "He said: 'I've never seen a 100 percent anything. He said 'I've been doing this a lot, I've seen 93.5 [percent], I've seen 96.1, I've seen 97.'"

"'No one is 100 percent Irish,' he said," O'Brien added. Even in Ireland, people aren't 100 percent Irish, according to O'Brien's doctor.

"You will find that the most Irish-looking people are like 86 percent, 94 percent Irish. The Lucky Charms leprechaun, true fact, 11 percent Spanish," he added.

Rachel Thompson, sits wearing a dress with yellow florals and black background.
Rachel Thompson
Features Editor

Rachel Thompson is the Features Editor at Mashable. Rachel's second non-fiction book The Love Fix: Reclaiming Intimacy in a Disconnected World is out now, published by Penguin Random House in Jan. 2025. The Love Fix explores why dating feels so hard right now, why we experience difficult emotions in the realm of love, and how we can change our dating culture for the better.

A leading sex and dating writer in the UK, Rachel has written for GQ, The Guardian, The Sunday Times Style, The Telegraph, Cosmopolitan, Glamour, Stylist, ELLE, The i Paper, Refinery29, and many more.

Rachel's first book Rough: How Violence Has Found Its Way Into the Bedroom And What We Can Do About It, a non-fiction investigation into sexual violence was published by Penguin Random House in 2021.


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