The Tenth Doctor appears slim and youthful with unruley ginger hair, wearing a shabby brown overcoat, a rumpled pinstripe suit and tie, with battered second-hand canvas sneakers. He speaks with what sounds to be an Estuary English accent.

The details of the Tenth Doctor's personality have yet to be revealed, but he appears to be a bit more child-like and isn't nearly as gloomy as his previous incarnation.

The Doctor was forced into regeneration from suffering massive cellular damage to his body due to absorbing the energies of the time vortex in order to save the life of his companion, Rose Tyler.