Dermot O'Leary's wife Dee Koppang O'Leary has joined 'The Split' as lead director.
Dee Koppang and Dermot O'Leary
The 42-year-old helmer - who has worked on 'Bridgerton' and 'The Crown' - will oversee the third and final series of the BBC One drama, and production on the season is underway.
Another addition for the third series sees 'Sherlock' star Lara Pulver join the cast as leading child psychologist Kate.
She will appear alongside returning stars Nicola Walker, Annabel Scholey and Fiona Button, who play the Defoe sisters; Deborah Findlay, who portrays their formidable mother Ruth, and Barry Atsma, who will reprise his role as Christie.
Creator Abi Morgan said: "For every writer there are characters that stay with them, long after a show is over, Hannah Defoe and her family are just that, and it’s been a welcome balm after a difficult year globally, to reunite this brilliant cast.
"'The Split' has been building to this exhilarating final act for the Defoes as they navigate their way through the marital make up and break up, both personally and professionally, at Noble, Hale and Defoe.
"They say you can’t have new beginnings without endings, and I want to say a big thank you to the BBC and AMC, and the fans who have kept running by our side."
Other returning cast members include Damien Molony (Tyler), Chukwudi Iwuji (Zander), Rudi Dharmalingham (James), Elizabeth Roberts (Liv Stern), Ian McElhinney (Prof Ronnie), Anna Chancellor (Melanie Aickman) and Kobna Holdbrook-Smith (Glen Peters).
Lucy Richer, Executive Producer for the BBC, added: "'The Split' is one of our most-loved and most-talked about drama series and we’re thrilled to be back in production with series three.
"As ever, Abi Morgan’s incredible writing sparkles with truth and honesty, wit and heartbreak.
"It is fantastic to be back with the Defoes, with Hannah and Nathan facing their biggest challenge yet - how to survive the break up of their marriage, and navigate their own divorce."
The Split's third series will air in 2022.
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