Ruth Wilson’s next project is a family affair. The “Luther” and “The Affair” star will play her own grandmother, Alison Wilson, in the upcoming film “Mrs. Wilson,” according to comments from Masterpiece chief Rebecca Eaton at the 2018 Winter TCA Tour on Tuesday. The project is based on Alison’s memoir about the day a woman showed up at her door, claiming to be her dead husband’s wife. Alison quickly finds she wasn’t the only “other” Mrs. Wilson in a confusing twist events involving WWI and WWII, a philandering husband and his secret spy career for British intelligence.

After that fateful day, Alison discovered that she was one of multiple wives of Alexander Wilson, a mystery writer and secret MI6 spy. The man, who had served in WWI before working for the MI6 in WWII, fell in and out love several times over his lifetime, leaving confused wives and children in his wake. “Mrs. Wilson,” a film adaptation of Alison’s recent memoir, follows Alison’s journey towards the truth about her husband and his past lives. The film will be set in 1940s and 1960s London and 1930s India, according to Deadline.

“Mrs Wilson” is a Masterpiece project and collaboration between PBS and the BBC, written for the screen by Anna Symon (“Indian Summers”). Ruth Wilson executive produces alongside Ruth Kenley-Letts (“The Casual Vacancy”), Neil Blair (“Fantastic Beasts and Where To Find Them”), Lucy Richer for the BBC and Eaton for PBS’ Masterpiece Theater. International distribution will be handled by all3media International.

Intrigued by the story of Alexander Wilson? What do you think of Ruth Wilson playing her own grandmother? Let us know in the comments below!