About Thomas Gibson
Thomas Ellis Gibson is an American actor and director best known for his roles as Aaron Hotchner on Criminal Minds (2005–16), Greg Montgomery on Dharma & Greg (1997–2002) and Daniel Nyland on Chicago Hope (1994–97). After a year and a half at Charleston, Gibson won a scholarship to Juilliard's Drama Division (Group 14: 1981–1985), where he graduated with a Bachelor of Fine Arts degree in 1985. Gibson's first television appearance was in 1987, in a guest role on the legal drama Leg Work, followed by stints on the daytime dramas As the World Turns and Another World.
Biography source: Wikipedia. The profile adds birthday-specific historical context from the Celebs Birthday Today editorial database.