Michael Stephen Portnoy (born April 20, 1967) American drummer primarily known as the former drummer and backing vocalist for the progressive metal band Dream Theater. Known for his drumming prowess, Portnoy has won 23 awards from the Modern Drummer magazine. He has co-produced the last six Dream Theater albums with John Petrucci, starting from Metropolis Pt. 2: Scenes from a Memory. From A Change of Seasons onwards, Portnoy has been writing a substantial amount of Dream Theater's lyrics, filling the void left by Kevin Moore, who left the band after the release of Awake.

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