A new BBC drama with an all-star cast has begun shooting in Northern Ireland.
Mrs Wilson stars award-winning actress Ruth Wilson (36), from hit show Luther, and is based on the memoirs of her real-life grandmother. The three-part drama is set between 1940s and 1960s London.
The series follows Alison Wilson, who thinks she is happily married until her husband - novelist Alexander Wilson - dies, and a woman turns up on her doorstep claiming that she is the real Mrs Wilson.
Alison is determined to prove the validity of her own marriage, but is instead led into a world of disturbing secrets.
Alexander Wilson was a writer, spy and secret service officer who served in the First World War before moving to India to teach as a professor of English literature, where he began writing spy novels. He passed away in 1963.
Mrs Wilson also stars Iain Glen from Game Of Thrones and Delicious as Alexander, as well as Keeley Hawes, star of The Durrells and Line of Duty, Anupam Kher, from Silver Linings Playbook, and Harry Potter actress Fiona Shaw.
Commenting on her new role, Ruth Wilson said: "I am so excited to bring to the small screen the extraordinary lives of my grandparents. Theirs is a moving story."
Written by Anna Symon and directed by Richard Laxton, the production began shooting this week in Northern Ireland and London.
Richard Williams, chief executive of Northern Ireland Screen, said: "We are delighted to welcome the cast and crew of Mrs Wilson to Northern Ireland and to continue our successful partnership agreement with the BBC, which sees the continued investment in developing an internationally competitive screen industry here.
"Mrs Wilson is set to follow in the footsteps of other incredible dramas such as Line Of Duty, The Fall and, most recently, Come Home.
"This is another strong vote of confidence in our local TV industry and further cements Northern Ireland's reputation as a world-class production location. We wish the entire team all the best for their shoot."
Lucy Richer, executive producer for the BBC, added: "Anna Symon's scripts, based on the remarkable story of Ruth Wilson's grandparents, are full of twists and turns.
"It is a story of breath-taking secrets and love against the odds, and I can't wait to see it brought to life for BBC One by such a fascinating cast, led by Ruth."
Mrs Wilson will air on the BBC, as well as PBS's Masterpiece programming in the US.