Back in August it was revealed that Stepbrothers and Talladega Nights co-stars Will Ferrell and John C. Reilly are reuniting for Holmes and Watson. Now they have some company, as Ralph Fiennes and Hugh Laurie have joined the movie.

Ferrell is set to be Sherlock Holmes in this comedy take on Arthur Conan Doyle’s detective, with Reilly as Watson. It’s not known who Laurie and Fiennes will be, although they will apparently ‘slip on the shoes of two beloved characters from the Holmes oeuvre’. That likely means one of them will be Moriarty, with the other either as Holmes’ brother Mycroft, or Inspector Lestrade.

Etan Cohen is writing and directing the movie, which is already shooting in London. The movie is due out in 2018.