Steven Moffat has joked that Mildred is the real name of Doctor Who.
The 'Who' executive producer, who took the reins of the BBC sci-fi drama in 2010, claims the popular character's real identity - which has been shrouded in secrecy since the show first hit the airwaves 50 years ago - is only divulged to the most senior of staff.
Writing in the new edition of 'Doctor Who' magazine, he quipped: "No one can know the Doctor's name, except each successive showrunner. We're taken into a special room far beneath the BBC and given the ancient and special runes that spell his true and awful name.
"We're commanded never to reveal what we have learned, because then the show would have to be renamed 'Mildred'. Oh, bugger!"
Steven is currently hard at work on the upcoming eighth series of 'Doctor Who', which will see Peter Capaldi take over the role of the Time Lord.
The 56-year-old actor will be joined by a host of big names on his first adventures in the TARDIS.
Guest stars this series include comedian Frank Skinner, 'Line of Duty' star Keeley Hawes, 'Death in Paradise' actor Ben Miller and singer Foxes.
The Doctor will also come face-to-face with a familiar nemesis from his past as it's rumoured producers are bringing back the villainous Master, last played by John Simm.
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