Band members
Dream Theater today
- John MyungBass · 1985–today
- John PetrucciGuitar · 1985–today
- Mike PortnoyDrummer, backing vocalist, and co-founder · 1985–2010, 2023–today
- James LaBrieVocals · 1991–today
- Jordan RudessKeyboards · 1999–today
Past members
- Chris CollinsVocals · 1985–1986
- Kevin MooreKeyboards · 1985–1994
- Charlie DominiciVocals · 1987–1989
- Derek SherinianKeyboards · 1994–1999
- Mike ManginiDrums · 2010–2023