Armstrong has also pursued musical projects including numerous collaborations with other musicians. The band later changed its name to Green Day. He met Dirnt while attending elementary school, and the two instantly bonded over their mutual interest in music, forming the band Sweet Children when the two were 14 years old. Īrmstrong developed an interest in music at a young age, and recorded his first song at the age of five.

Armstrong has been considered by critics as one of the greatest punk rock guitarists of all time. He is also a guitarist and vocalist for the punk rock band Pinhead Gunpowder, and provides lead vocals for Green Day's side projects Foxboro Hot Tubs, The Network, The Longshot, and The Coverups. He is best known as the lead vocalist, primary songwriter, and lead guitarist of the rock band Green Day, which he co-founded with Mike Dirnt in 1987.

Billie Joe Armstrong (born February 17, 1972) is an American singer, songwriter, guitarist and actor.