Despite originally intended to be released on Saturday. Doctor Who have tweeted on their official Twitter page and announced that the anniversary minisode, The Night of the Doctor will be released today shortly after noon.

Surprise! The 50th starts NOW! The Night Of The Doctor on iPlayer in less than an hour. Speak to no one till you've see it! RUN!
— Doctor Who Official (@bbcdoctorwho) November 14, 2013

The news follows an update to the BBC iPlayer page for the special last night, which incorrectly said the minisode would be broadcast on BBC One. A link to the page where the minisode will be made available in the UK can be found here.

It is currently unknown how the minisode will be available overseas. Despite the minisode being labelled as an "iPlayer exclusive", overseas fans should expect the minisode to become available on streaming sites such as YouTube.