Thomas Gibson (born on July 3, 1962, in Charleston, South Carolina, USA) is an American actor currently starring in the CBS series Criminal Minds, as Unit Chief Agent Aaron "Hotch" Hotchner, the head of the BAU team. Previously, he played Beauchamp Day in the Tales of the City miniseries in 1993, then moved on to star in two popular series in the 1990s: The CBS medical drama Chicago Hope as Dr. Danny Nyland from 1994 to 1997, and then a very successful comic turn as Gregory Clifford Montgomery in the ABC sitcom Dharma & Greg.

Gibson has been married to Christina Gibson since 1993 and they have three children, sons James Parker (born in 1999) and Travis Carter (born in 2002) and daughter Agatha Marie (born in 2004). He and his family reside in San Antonio, Texas.