Daisy Lewis Joins Downton Abbey Cast Daisy Lewis has been cast as a Governess in Downton Abbey. Daisy Lewis Joins Downton Abbey Lewis will join the Downton household as a governess for Branson’s daughter. Romance will be kindled between Lewis’s character and former chauffeur Tom Branson as Lewis’s character helps Branson get over the death of his wife Lady Sybil. The romance is expected to be one of the big storylines of series 4 of Downton Abbey. Lewis isn’t the only new face to be going Downton, Paul Giamatti will be making an appearance as the playboy brother of Lady Cora (Elizabeth McGovern), and Gary Carr has been cast as the first recurring black cast member and will play a popular jazz singer. Are you excited for the return of Downton ? Let us know what you thought of it in the comments below or write on our Wall on our Facebook Page. You can even tweet us @86thfloor ! Downton Abbey series 4 returns to the UK in the autumn. It will air in the US in January, 2014.