The Selfridge children are all grown up in the third series of Mr Selfridge, which picks up in 1919 just after the end of World War I.

In the new series which is about to start filming in London, the role of Harry’s eldest daughter, Rosalie, (played by Poppy Lee Friar in Series 1 and 2) is taken over by Kara Tointon. Kara (represented by Curtis Brown) played Dawn Swann in Eastenders for four years and won Strictly Come Dancing in 2010.

Kara’s real-life sister, Hannah Tointon, plays her rebellious sister, Violette in a move that sees the sisters acting together for the first time. 26 year old Hannah (represented by Independent Talent) played Katy Fox in Hollyoaks and more recently starred in Switch on ITV2 and BBC's The Hour.

In the new ten-episode series Rosalie is set to marry the handsome son of trouble-making Russian princess Marie, played by Zoe Wanamaker. Serge...