"Ah. No. I'm from a galaxy far... far away, me." He quirked a wry smile as the Jedi Master studied him. "I think you'll find you're far more recognisable than you think. Even by people not from your world."
He nodded as Luke spoke in agreement and then a slow smile spread back across his face at the question, followed by the rest of this words. "I've always liked Obi-Wan Kenobi. Old Ben. Good man. Of course, looks can be deceiving. Especially here. And with me." The Doctor thought of the few people who had come and gone who bore a resemblance to his current regeneration. And then of course there were the older versions of him, the next Doctors.
"But, no, you're right. I'm the Doctor. Hello. Sorry, I forget to introduce myself sometimes. Mouth runs away with itself."