Billy Bob Thornton Lorne Malvo Actor Martin Freeman Lester Nygaard Actor Colin Hanks Gus Grimly Actor Allison Tolman Molly Solverson Actor Bob Odenkirk Bill Oswalt Guest Star Keith Carradine Lou Solverson Guest Star Russell Harvard Mr. Wrench Guest Star Keegan-Michael Key FBI Agent Pepper Guest Star Jordan Peele FBI Agent Budge Guest Star Kate Walsh Gina Hess Guest Star Joey King Greta Grimly Guest Star Rachel Blanchard Kitty Nygaard Guest Star Susan Park Linda Park Guest Star Noah Hawley Executive Producer Warren Littlefield Executive Producer Joel Coen Executive Producer Ethan Coen Executive Producer J. Geyer Kosinski Executive Producer