Keegan-Michael Key, Jordan Peele Keegan-Michael Key, Jordan Peele

Comedians Keegan-Michael Key and Jordan Peele have joined FX's upcoming Fargo adaptation.

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.

TV characters that need to die

Martin Freeman stars in the series as Lester Nygaard, a small-town insurance salesman who gets caught in Malvo's web. Colin HanksBob OdenkirkOliver PlattAdam GoldbergKate WalshGlenn HowertonKeith Carradine and Allison Tolman also star.

The limited series will premiere Tuesday, April 15 at 10/9c on FX.