THIS IS A MISSTAG. The correct spelling is Dream Theater. Please change your tags. Dream Theater is an American progressive metal band formed in 1985 under the name Majesty by John Myung, John Petrucci and Mike Portnoy while they attended Berklee College of Music in Boston, before they dropped out to support the band. Though a number of lineup changes followed, the three original members remain today along with James LaBrie and Jordan Rudess.