Christopher Guest (This is Spinal Tap) has joined Fox's sequel Night at the Museum 2: Escape From the Smithsonian, set to play Ivan the Terrible in the comedic adventure.
The Hollywood Reporter confirmed additional castings to include Jon Bernthal (Al Capone), Bill Hader (Gen. George Armstrong Custer) and French actor Alain Chabat (Napoleon).
The film, directed by Shawn Levy, reunites lead Ben Stiller with castmates Robin Williams, Ricky Gervais and Owen Wilson.
Robert Ben Garant and Thomas Lennon, who penned both "Museum" films, will make a cameo in the sequel, playing the Wright brothers.
The film is currently shooting in Vancouver.