Cosmo Jarvis, star of FX’s smash hit period series “Shōgun,” has landed a role in Guy Ritchie’s next film, “Wife & Dog.”

The Brit joins a heady lineup of names already confirmed for the feature, first announced by Variety last year and set to see Ritchie return to the colourful, backstabbing world of the British upper classes (doubling down on a subject he recently explored in “The Gentleman” film and TV series). Benedict Cumberbatch, Rosamund Pike and Anthony Hopkins have been announced as leading the feature and, while plot details remain under wraps, Jarvis is understood to be to playing Hopkins’ son and Pike’s sister.

The “Wife & Dog” screenplay is written by Ritchie, who also produces alongside long-time producing partner, Ivan Atkinson and Black Bear’s John Friedberg. Executive producers include Teddy Schwarzman and Michael Heimler for Black Bear.

After breaking out alongside Florence Pugh and...