The spin-off will reportedly [The Sun] explore the early life of Carolyn Martens, who's by Fiona Shaw in hit BBC drama Killing Eve.
A source told The Sun: "In many ways Carolyn was a bit of curveball choice for a prequel, but in other ways she was an obvious choice. The creators could have gone for Villanelle or Eve, but Carolyn provides a different take on things...
They continued: "Bosses felt that Killing Eve had to come to an end but its spirit should live on in a new form, and this is the project they’re focusing their efforts on now. It’s in the early stages of development and the finished series is months, if not years, away. But at least fans have something to look forward to."
Meanwhile, the fourth and final series of Killing Eve is currently airing on BBC One and iPlayer. The next episode airs Saturday night at 9:15pm [UK].
Speaking about the final series, Sandra Oh said: “Killing Eve has been one of my greatest experiences and I look forward to diving back into Eve’s remarkable mind soon. I’m so grateful for all cast and crew who have brought our story to life and to the fans who have joined us and will be back for our exciting and unpredictable fourth and final season.”
Jodie Comer added: “Killing Eve has been the most extraordinary journey and one that I will be forever grateful for. Thank you to all the fans who’ve supported us throughout and come along for the ride. Although all good things come to an end, it’s not over yet. We aim to make this one to remember!”
Killing Eve is available on BBC iPlayer.