Acting as the energetic lead guitarist for pop/punk unit Fall Out Boy, Joseph Trohman was born on September 1, 1984, and relocated with his family to suburban Chicago during middle school. He got involved in the area's hardcore scene as a teen, and following a summer spent touring on bass with local act Arma Angelus when he was 16, he got to talking with that group's lead vocalist, Pete Wentz, about forming a poppier, more Green Day-influenced band together. Wentz (who was known for being involved in multiple projects at once) was into the idea, and after Trohman met drummer Patrick Stump at a local Borders bookstore, he subsequently brought him onboard as the group's singer and rhythm guitarist. After officially forming Fall Out Boy in 2001, the guys -- eventually completed by drummer Andy Hurley -- steadily built up a loyal grassroots following around the country before exploding into the mainstream consciousness with their 2005 album, From Under the Cork Tree. ~ Corey Apar, Rovi