From the BBC:
Oscar-winning US actress Shirley MacLaine is to join the cast of Downton Abbey for its third series as the mother of Lady Grantham.Here is a very short clip of Miss MacLaine playing another fearsome early 20th century character Coco Chanel - a taster for what is to come?
MacLaine - whose character is named Martha Levinson - will begin filming with the rest of the cast next month.
"It is so exciting to have an actress of Shirley MacLaine's stature joining our brilliant Downton Abbey cast," said Laura Mackie, ITV's director of drama.
"It is a tribute to the show's success on both sides of the Atlantic."
"Julian [Fellowes] has written another brilliant character in Martha Levinson, who will be a wonderful combatant for Maggie Smith's Dowager Countess," said Gareth Neame of Downton producer Carnival Films.
Downton Abbey website