The Mirror claimed that all ten incarnations of The Doctor would appear together in a 15-minute episode to be shown as part of the annual telethon in November.
The special would see David Tennant's Doctor calling on his nine predecessors to help him find a missing piece of Time Lord apparatus. The actors who portrayed the first three Doctors - William Hartnell, Patrick Troughton and Jon Pertwee - are all deceased but would be represented by archive footage.
The report also claimed that the special would mark the first appearance of Matt Smith as the Doctor, although Smith is not due to take over from Tennant in the titular role until early 2010.
A spokesman told the newspaper: "Nothing has been finalised yet, although there is discussion of a Children in Need Doctor Who special. It is too early to say what."