By Jordyn Schwersky, Hollywood Staff
Paul Giamatti has joined the cast of Downton Abbey for season 4 as the playboy brother of Elizabeth McGovern's Lady Grantham. The fourth season will air on PBS beginning January 5, 2014.
The period drama showcases a very English way of life, and Giamatti, like Shirley MacLaine before him in Season 3, will play an ugly American relative of those well put-together English folks. Giamatti's character is described by the show's producers as being ''rather free-spirited'' and ''sure to upset the Granthams' apple cart.'' in this year's finale.