4. He's adorably humble.
When James thanked Harris for attending the show, he gushed about the "dream guest." Harris was surprised and humbled to hear that Corden was such a huge fan. Even though NPH is an acclaimed singer, dancer, and actor of both the stage and screen, he was genuinely surprised and grateful for Corden's praise. Looks like decades of success haven't jaded him.
Watch The Late Late Show on CBS.