Carnival Films, ITV and MASTERPIECE on PBS/WGBH today announced that Emmy, Golden Globe and SAG award winner Paul Giamatti (John Adams, Sideways, Barney's Version, Cinderella Man) has joined the cast of the Emmy and Golden Globe award-winning drama, DOWNTON ABBEY.[SPOILER ALERT]
Giamatti will play Cora's maverick, playboy brother Harold in the series' finale. He will be starring alongside Shirley MacLaine and the regular cast members for the dramatic climax to Series 4.