Lorne Malvo is a fictional character and the main antagonist of the first season of the FX television series Fargo. He is portrayed by Billy Bob Thornton, who received critical acclaim for his performance and was nominated for a Primetime Emmy Award and a Screen Actors Guild Award, and won a Golden Globe Award and a Critics' Choice Television Award.

The first season of the anthology black comedy–crime drama television series Fargo, premiered on April 15, 2014, on FX. Starring Billy Bob Thornton, Allison Tolman, Colin Hanks and Martin Freeman, the season consisted of ten episodes and concluded its initial airing on June 17, 2014.