Aaron Gillespie is an American musician, best known as the drummer and co-founder of the rock band Underoath. He has also pursued a successful solo career and is recognized for his work in the Christian rock genre. Gillespie's musical style blends elements of post-hardcore and alternative rock, showcasing his versatility as both a drummer and vocalist. In addition to his work with Underoath, Aaron Gillespie has collaborated with various artists and bands, contributing to numerous projects. He is also known for his engaging live performances and has released several albums, both as a solo artist and with his bands, further solidifying his influence in the music industry.