"How can there be another Rose?” Russell T. Davies said in a statement. “You’ll find out in 2023, but it’s an absolute joy to welcome Yasmin to the ‘Doctor Who’ set."
As far as Doctor Who fans are concerned, Jodie Whittaker still has some time left to inhabit the Thirteenth Doctor. Two more specials starring Whittaker's incarnation of the legendary Time Lord are on the way later this year, following the New Year's special "Eve of the Daleks," which aired over the weekend, so it's not quite time to say goodbye.
It's an unspoken hallmark of Doctor Who that the Doctor is a virtually androgynous character they can be played by anyone, and part of what makes being a fan of the show so invigorating is waiting with bated breath to see who will be playing the next Doctor, and how their take on the role will differ from their predecessor.