Former Doctors David Tennant and Matt Smith have kicked off something of a convention war… over who is the more popular guest!

Attending Wizard World Comic Con Philadelphia, Tennant alongside former co-star Billie Piper started the good natured contest by sending a message to Matt Smith, currently in Australia for the Whoniverse convention tour alongside Karen Gillan, Alex Kingston and Freema Agyeman.

In the video, Tennant taunted his successor by saying:

“We’re killing it up here in Philly… I think they prefer us to you. That’s very much the vibe that we’re getting. But you know, do what you can out there and we miss you very much. Have fun.”

Matt certainly wasn’t going to take that laying down and recorded a response on-stage, saying:

“Tennant, Piper, hello. We see your video and we raise your video dude… we’re in Australia mate!”

David responded once again with:

“Matt, Freema, Alex, so you sent a video from your Australian convention - ‘oh look at us we’ve got thousands of friends here’ - all cheering and whooping and showing off. Well I’m in Philadelphia and behind these walls is all of Philadelphia, about 4.5 million people ready out here to tell you how popular we are… but I don’t need to show you that.”

Who do DWW readers believe is winning this battle? let us know on Twitter, Facebook or our comments section!