Gregory Ellis Mathis, known professionally as Judge Mathis, is a former Michigan 36th District Court judge, television court show arbitrator, author, television producer, and motivational speaker.

A court show is a broadcast programming subgenre comprising legal dramas and reality legal programming. Court shows present content mainly in the form of legal hearings between plaintiffs and defendants presided over in one of two formats: scripted/improvised with an actor portraying a judge; or an arbitration-based reality format with the case handled by an adjudicator who was formerly a judge or attorney.