Capaldi, who recently began filming as the Twelfth (or is it the Thirteenth? or Fourteenth?) Doctor, stopped to chat with a worried young fan and reassure her that the Doctor may have changed faces, but she would still recognize the man piloting the TARDIS.
"[Eleventh Doctor] Matt [Smith] said to me to look after Doctor Who and he gave me his watch and he said that, in his own way, he was happy that it was me coming in," Capaldi explained to the girl. "So I will do my very best to be as much fun and as friendly as he is."
Still, Capaldi said, "I will be different."
Then, he pulled up a picture on his phone of Smith and Jenna Coleman, who will stay on as the Doctor's companion Clara.
"They say it’s OK for me to be the Doctor," he said. "I hope that you think it would be OK for me to be the Doctor too... I might be a bit noisy at first!”
Capaldi seems sweet with the child, and nothing like his brash, foul-mouthed Thick of It character Malcolm Tucker.
Here's Capaldi with the young fan in question -- dressed as a Dalek, of course -- with her mom.
Celebrity Couples of 2014 [PHOTOS]