Mike Dirnt is an American musician best known as the bassist and co-founder of the punk rock band Green Day. Born on May 4, 1972, in Berkeley, California, he has been a key member of the band since its formation in 1986. Dirnt's energetic playing style and distinctive sound have contributed significantly to the band's success. In addition to his work with Green Day, Dirnt has also pursued solo projects and collaborated with other artists. He is recognized for his passion for music and has been influential in the punk rock genre, helping to shape its evolution over the years.