New Doctor Who set to be unveiled during a ground-breaking live episode
Their identity is being kept a secret using the codename 'Houdini'
Speculation is rife the new Doctor could be a woman for the first time
Dame Helen Mirren and comedienne Miranda Hart are both in the running
The Thick of It star Peter Capaldi has also been touted for the role
It has been two months since he announced he was leaving Doctor Who.
And fans of the show will finally find out who will be replacing Matt Smith as the 12th incarnation of the Time Lord this weekend.
The new Doctor Who will be revealed live on BBC1 on Sunday in a one-off programme at 7pm.
Groundbreaking: Matt Smith's replacement as the new Doctor Who will be unveiled during a one-off live episode of the show on Sunday night
Helen Mirren, Olivia Coleman and Miranda Hart, have all been put forward as suggestions, as has Billie Piper, who played one of the Doctor’s former side-kicks.
