“Fargo” Season 4 really rounded out its cast on Thursday, naming 12 new members of Noah Hawley’s players who will join previously-announced star, Chris Rock.

The cast is led by Jack Huston, Jason Schwartzman and Ben Whishaw, along with Jessie Buckley, Salvatore Esposito, Andrew Bird, Jeremie Harris, Gaetano Bruno, Anji White, Francesco Acquaroli, E’myri Crutchfield and Amber Midthunder.

The fourth season of “Fargo” will travel back to the 1950s.

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FX provided the following summation of Season 4:

In 1950, at the end of two great American migrations — that of Southern Europeans from countries like Italy, who came to the US at the turn of the last century and settled in northern cities like New York, Chicago — and African Americans who left the south in great numbers to escape Jim Crow and moved to those same cities — you saw a collision of outsiders, all fighting for a piece of the American dream. In Kansas City, Missouri, two criminal syndicates have struck an uneasy peace. One Italian, one African American. Together they control an alternate economy — that of exploitation, graft and drugs. This too is the history of America. To cement their peace, the heads of both families have traded their youngest sons. Chris Rock plays the head of one family, a man who — in order to prosper — has surrendered his youngest boy to his enemy, and who must in turn raise his enemy’s son as his own. It’s an uneasy peace, but profitable. And then the head of the Kansas City mafia goes into the hospital for routine surgery and dies. And everything changes. It’s a story of immigration and assimilation, and the things we do for money. And as always, a story of basically decent people who are probably in over their heads. You know, Fargo.

“Fargo” will begin production this fall in Chicago. It will air on FX in 2020. Joel and Ethan Coen, along with Warren Littlefield, serve as executive producers. “Fargo” is produced by MGM Television and FX Productions, with MGM Television serving as the lead studio and international distributor.

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Here is who everyone else is playing, according to FX: