Coleman will be written out of her role as The Doctor's intrepid companion Clara Oswald prior to this year's Christmas special, according to The Mirror.
Her reported departure from Doctor Who apparently coincides with the actress landing a major role, starring as a young Queen Victoria in a new ITV drama with a reported budget of £10m.
Earlier this year, ITV announced it was partnering with novelist Daisy Goodwin and the producers of Poldark for an eight-part series about Queen Victoria's reign.