David On MTV News

"The Internet is a curious place, isn't it?" Tennant told MTV News.
"I think someone sits in their bedroom in Saskatchewan and comes up with an idea and they post it. And within minutes it's around the world and I'm getting phoned up by journalists and friends of mine saying, 'When are you off to shoot with Guillermo [del Toro]?'" said Tennant. "It's not something I know anything about."
"No one's talked with me," he added.
While Tennant's no stranger to special effects, he doubted even the most impressive computer's ability to bring him down to Hobbit size.
"I'm a bit tall, aren't I?" he joked. "I know they do things with CGI now, but I'm 6'1". Hobbits are little. I do have quite hairy toes, though."

The video can only be viewed by fans in the USA.