The duo, best known for their Comedy Central sketch show Key and Peele, will star in a guest arc in the final four episodes of the 10-episode series. They will play FBI partners Webb Pepper (Peele) and Bill Budge (Key), who are obsessed with finding manipulative criminal Lorne Malvo (Billy Bob Thorton) after a violent altercation.
Martin Freeman stars in the series as Lester Nygaard, a small-town insurance salesman who gets caught in Malvo's web. Colin Hanks, Bob Odenkirk, Oliver Platt, Adam Goldberg, Kate Walsh, Glenn Howerton, Keith Carradine and Allison Tolman also star.
The limited series will premiere Tuesday, April 15 at 10/9c on FX.