It’s been known for a few months now that Will Ferrell and John C. Reilly will appear onscreen together in starring roles for the first time since 2008’s Step Brothers for 2018’s comedic Sherlock Holmes adaptation, Holmes & Watson, but now, according to Deadline, Sony and the creative team behind the picture are beginning to round up the film’s supporting cast.

Reportedly, Rebecca Hall (Christine), Rob Brydon (The Huntsman: Winter’s War), Kelly Macdonald (Brave) and Lauren Lapkus (Jurassic World) are all set to star in the upcoming comedy, which sees Get Hard director Etan Cohen on both scripting and directing duties.

Macdonald and Brydon’s characters are straight out of Sir Arthur Conan Doyle’s original stories, just as Ferrell will be playing Holmes and Reilly is Watson, but Lapkus and Hall’s roles, presumably, have been made up for the movie. Macdonald has signed on to the role of Mrs. Hudson, “the housekeeper of Holmes & Watson’s famous home at 221B Baker Street” and Brydon will bring Scotland Yard head Inspector Lestrade to the silver screen.

Hall is on board to play Dr. Grace Hart, “the first female doctor to practice in London,” while Lapkus is set to play Millie, an intelligent woman who Holmes becomes quite smitten, maybe even borderline obsessed, with.