Dream Theater is an American progressive metal band formed in 1985.¹⁾

The band was originally named Majesty before changing their name to Dream Theater in 1989.²⁾

Dream Theater's music combines elements of progressive rock, metal, and classical music.³⁾

The band's founding members are John Petrucci (guitar), John Myung (bass), and Mike Portnoy (drums).⁴⁾

Dream Theater has had several lineup changes over the years, with James LaBrie (vocals) and Jordan Rudess (keyboards) joining the band in the 1990s.⁵⁾

They are known for their technical proficiency and complex song structures.⁶⁾

Dream Theater's debut album, “When Dream and Day Unite,” was released in 1989.⁷⁾

Their breakthrough album, “Images and Words,” released in 1992, featured the hit single “Pull Me Under.”⁸⁾

Dream Theater has released numerous concept albums, including “Metropolis Pt. 2: Scenes from a Memory” and “Six Degrees of Inner Turbulence.”⁹⁾

They have sold over 12 million records worldwide.¹⁰⁾

Dream Theater has won several awards, including a Grammy nomination for Best Metal Performance in 2013.¹¹⁾

The band's music often features extended instrumental sections and complex time signatures.¹²⁾

Dream Theater's longest song is “Octavarium,” which is over 24 minutes long.¹³⁾

They are known for their live performances, which often include improvisation and extended solos.¹⁴⁾

The band has its own annual music festival called “ProgPower USA.” ¹⁵⁾