The highly anticipated third season of the widely popular television drama series "Downton Abbey" is set to introduce a new cast to the show. The article discusses the addition of new actors and the characters they will portray in the upcoming season.

The first new cast member to join the show is Shirley Maclaine, a legendary actress who will play the role of Martha Levinson, the mother of Lady Grantham, played by Elizabeth McGovern.

Martha is described as a wealthy American woman with a sharp wit and a clash of cultures is expected as she gets introduced to the British society of Downton Abbey. Maclaine's character is said to bring a new energy and dynamic to the show, making her appearance highly anticipated.

Another new addition to the cast is Irish actor Allen Leech who will be portraying the character of Tom Branson. Tom, the former chauffeur and now husband of Lady Sybil, played by Jessica Brown Findlay, is said to have a more prominent role in the upcoming season.

The article suggests that his character will have to face challenges as he becomes more involved in the family affairs and the aristocratic society of Downton Abbey. Leech is praised for his talent and his ability to portray the complexities of his character.

In addition, the article mentions the arrival of a new maid, Edna Braithwaite, who will be played by MyAnna Buring. Edna is described as a manipulative and ambitious woman who will cause trouble within the household.

Her character is said to bring some excitement and drama to the show, as she tries to climb the social ladder and meddle with the lives of the residents of Downton Abbey.

Furthermore, the article briefly mentions the introduction of other new characters, but provides limited information about them. Simon Bricker, a guest character played by Richard E. Grant, is described as a disruptive force who will shake things up at Downton Abbey.

Meanwhile, Daisy Lewis will portray a governess named Sarah Bunting, who is expected to have conflicts with the existing characters.

Overall, the article highlights the introduction of new cast members and the characters they will play in the third season of "Downton Abbey." The inclusion of renowned actress Shirley Maclaine, along with other talented actors, is expected to bring fresh excitement and new storylines to the beloved show.

Fans eagerly await the premiere of the new season to witness the impact of these new characters on the lives of the Crawley family and the residents of Downton Abbey.