VIDEO: Doctor Who Stars Message Each Other From Comic Cons Across The World

Thanks to celebrity promoter Barry Greenberg of Celebrity Connection, the stars of Doctor Who have been able to greet one another from Comic Cons on opposite sides of the world.

David Tennant and Billie Piper appeared together at Wizard World Comic Con in Philadelphia yesterday, while Matt Smith, Freema Agyeman and Alex Kingston were the star guests of Whoniverse in Brisbane, Australia. First up, David and Billie started a friendly rivalry with their fellow Doctor Who family members:
(Barry later acknowledged his typo, naming Freema instead of Billie)

Matt, Freema and Alex, currently on a five city tour of Australia with Whoniverse, took up the challenge and sent back this response from Brisbane:

David Tennant attends the final day of Comic Con Philadelphia today. Whoniverse will be stopping off at Perth, Melbourne and Adelaide over the next few days.

UPDATE: Click here to see David's reply