Jeffrey R. Staab / CBS

Watch Downton Abbey Stars Perform A Scene From The Show In Their American Accents On The Late Show

Don't sleep on Allen Leech, casting agents!

With Downton Abbey's final season about to wrap in the U.K. with its imminent Christmas special -- and its Season 6 run about to start on PBS in January -- several of its cast members visited The Late Show to promote the show. Fortunately, there was also time for some inspired goofiness, as host Stephen Colbert challenged Hugh Bonneville, Michelle Dockery, and Allen Leech to perform a scene from the show using American accents. I'm not quite sure how Texan Lord Grantham ended up with a Valley Girl for a daughter, but once Allen Leech joins the scene with an accent that seems to have a very specific inspiration, I don't care. Adorable.