PBSBill Hader recently found out that he is descended from not just royalty, but some major historical players. The "Saturday Night Live" alum discovered the news while having his lineage and DNA researched by the PBS docuseries "Finding Your Roots." In Business Insider's exclusive preview from the episode that airs Tuesday night, host Henry Louis Gates, Jr., hands the Tulsa, Oklahoma, native a lengthy diagram of his family tree, one that the host describes as "one of the most extensive European ancestries that we've ever been able to piece together." "Wow," Hader says upon seeing the document. PBS When Gates points out that the actor is descended from Kind Edward I of England, Hader is unable to stifle his giggles. "Charlemagne, the famed leader of the Holy Roman Empire," Gates points out another name.