Mike Portnoy is an American drummer and songwriter, best known for his work with the progressive metal band Dream Theater. Born on April 20, 1967, he co-founded the band in 1985 and played a significant role in shaping their sound until his departure in 2010. Portnoy is recognized for his technical skill and complex drumming style. In addition to Dream Theater, Portnoy has been involved in various other musical projects, including Liquid Tension Experiment and The Winery Dogs. He has received numerous awards for his drumming and is considered one of the most influential drummers in the rock and metal genres.