The new Doctor Who will be announced on Sunday (04.08.13).
According to doctorwhotv.co.uk, a replacement for Matt Smith - who announced in June he is quitting the sci-fi show after four years - will be revealed in a BBC One special 'Doctor Who Live: The Next Doctor'.
The show - which will be presented by Zoe Ball and filmed in front of a live studio audience - will air at 7pm and feature interviews and reactions from previous cast members.
While a number of actors have been linked to the role since Matt, 30, announced his impending departure, 'In The Loop' star Peter Capaldi, 55, has emerged as the favourite.
Matt recently revealed he felt the 50th anniversary year was the "right time" to leave 'Doctor Who'.
He explained: "I've had four wonderful years, been on some great journeys on and off screen. Part of me felt it was the right time to go after the 50th anniversary, after the celebration of its birthday, that perhaps it was my time [to go]."
The Eleventh Doctor will perish in this year's Christmas special and showrunner Steven Moffat has already told Matt how his incarnation of the Time Lord will regenerate into the Twelfth Doctor.
He teased: "I know Steven's written about 28 pages, he's pitched it to me and it sounds great. I think Steven [Moffat] is such a brilliant writer, he'll deliver something fitting and he'll write a great regeneration episode."
The 50th anniversary special - which also stars David Tennant, Jenna-Louise Coleman, Billie Piper and John Hurt - airs on November 23, exactly 50 years after it first started in 1963.
Tagged in Matt Smith Peter Capaldi