Which Doctor Who is the best kisser? Billie Piper starred with two Time Lords as companion Rose Tyler – and she’s now revealed why she considers David Tennant’s 10th Doctor a better snog than Christopher Eccleston’s ninth!

“I think I’ve kissed David more,” said Billie, laughing as she answered a question put to her by a young fan at Awesome Con in Washington DC who was offered $20 by his mum to ask Billie the sensitive question. “So I think we are more practised, more well-versed, and therefore our technique is somewhat better.”

Watch Billie answering the embarrassing question and also reveal which were her favourite ever Doctor Who episodes: