Michael Anthony Mangini (born April 18, 1963) is an American musician, primarily known as the former drummer of progressive metal band Dream Theater, with whom he played between 2010 and 2023. He has also played for bands and artists such as Annihilator, Extreme, James LaBrie, and Steve Vai. Before joining Dream Theater, Mangini was a faculty member at Berklee College of Music. Between 2002 and 2005, he set five World's Fastest Drummer records. Mangini appeared on the Discovery Channel show Time Warp, displaying his drum skills for high-speed cameras.