Famed comedian and writer, Larry David impersonated Sen. Bernie Sanders perfectly on Saturday Night Live last year, and much to their surprise, the two are actually related.

On the season four premiere of the PBS show Finding Your Roots, host Henry Louis Gates Jr. interviewed both David and Sanders separately, and explained how guests’ DNA are compared and matched for similarities. The two are told that if they both have long identical stretches of DNA, it means they are cousins.

Check out their reactions after the reveal and you can watch the full episode here.

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