House Speaker Paul Ryan was surprised and proud to find out he has Jewish roots.

The Wisconsin Republican discovered his family history while filming a segment for the upcoming season of the PBS series "Finding Your Roots With Henry Louis Gates Jr."

Gates said Tuesday at a TV critics meeting that he traced Ryan's heritage back to his 10th great-grandfather born in 1531 in Germany. The research showed Ryan is 3 percent Ashkenazi Jewish.

"You could have knocked him over with a feather and then he was very proud of it," Gates said of Ryan's reaction. "We don't know who that Jewish person was, but we know it was on his mother's German line, which makes sense. So somebody who was a Christian German slept with a Jewish German person and that's where that came from."