Thomas Baptiste Morello (born May 30, 1964) is an American guitarist best known for his tenure with the band Rage Against the Machine and then with Audioslave. Morello is currently a touring musician with Bruce Springsteen and the E Street Band . He is also known for his acoustic solo act called The Nightwatchman, and his latest group Street Sweeper Social Club. Morello is also the co-founder (along with Serj Tankian) of the non-profit political activist organization Axis of Justice, which airs a monthly program on Pacifica Radio station KPFK (90.7 FM) in Los Angeles.

Born in Harlem, New York, and raised in Libertyville, Illinois, Morello became interested in music and politics while in high school. He attended Harvard University and earned a Bachelor of Arts degree in Social Studies. After his previous band Lock Up disbanded, Morello met Zack de la Rocha and the two founded Rage Against the Machine together. The group went on to become one of the most popular and influential rock acts of the 1990s.