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

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.