The new six-part ITV drama Joan is inspired by the memoir of the real-life Joan Hannington, who labelled herself "Britain's most notorious diamond thief". Sophie Turner plays Joan in the new drama and spent time with the real Hannington before the cameras started rolling, having read her memoir several times to get into character.

A venture of ITV and The CW, Sophie Turner’s ‘Joan’ follows the remarkable true story of a woman named Joan Hannington. Set in the 1980s, the story takes us through the many ups and downs in her life,

Based on Joan Hannington’s memoir, “I Am What I Am: The True Story of Britain’s Most Notorious Jewel Thief,” the show first premiered on ITV in the UK in September. In America, it premieres Oct. 2 on the CW (9 p.m.) and on Dec. 5 on BritBox.