Former Republican presidential candidate Fred Thompson is registering as a lobbyist for a Tennessee trial lawyers group.

The Tennessee Association for Justice announced Tuesday that the former U.S. senator would be joining its legislative team this session.

Thompson was a lawyer and an actor before being elected to the U.S. Senate in 1993. He turned his back on politics after his first full term in favor of a full-time acting career in 2002, then ran unsuccessfully for president in 2008.

He was best known for his role as the gruff district attorney on NBC's "Law & Order" before leaving the show in 2007 to make his presidential bid.