In a web-chat for The Guardian to promote his new play "Unreachable, Smith told a fan that their young daughter "has a chance" of playing the Time Lord.
"I think a lady Doctor could be close - and would be fun. So practise, practise, practise. And talk really fast. And think really fast. And be really brave. And mad. And silly. And good luck - maybe it will be you!" Smith said.
Asked if he regretted appearing on the series himself, Smith replied: "No, absolutely not.
