Sherlock co-stars Benedict Cumberbatch and Martin Freeman look set to be reunited in Middle Earth in the Hobbit film.
Office star Martin, who is set to play the lead, Bilbo Baggins, in the prequel to Lord Of The Rings, let it slip backstage at the Bafta Awards after the cast and crew of the BBC One show picked up the gong for Best Drama Series.
Asked how filming is going, he said: "Peter Jackson is the biggest kid in the world and he is very, very focused on what he is doing and there is no resting on previous laurels as well and Benedict is going to be in it as well."
Asked what character he was playing, a red-faced Benedict said: "I can't say at the moment."
The film, being shot in Jackson's native New Zealand, is based on JRR Tolkien's novel which precedes his Lord Of The Rings trilogy.