Benedict Cumberbatch has revealed how he would laugh at Martin Freeman in his Hobbit costume.
The two Sherlock stars are reunited for Peter Jackson's two-part prequel The Hobbit: An Unexpected Journey, where Martin plays the titular character, Bilbo Baggins, and Benedict is Smaug the dragon.
"I got to hang out with him, and I kept a straight face for a bit and then I started giggling because I know Martin, I don't know Bilbo," he told MTV.com.
"For Martin to be sitting there playing Bilbo is amazing. He's going to be amazing, he's going to be fantastic in this film."
And Benedict - who last appeared in Steven Spielberg's War Horse - had high praise for director Peter.
"I was very lucky [to work] with Pete. As far as the experience, what an extraordinary one it was because at the time I was in my work; I was in isolation with him and this incredible tag team," he said.
"It was an awful lot of fun. It was sort of freeing; it was fun. It was like playing a game."
The 35-year-old actor is excited to see the result: "It's going to be an amazing film; it's going to be a real treat. I watched The Lord Of The Rings again before I started working, and the way those films grow in depth of craft on every level are extraordinary."