Aaron Roderick Gillespie is an American musician, best known for being the drummer and clean vocalist for the rock band Underoath, of which he is the only original member. He is also the lead singer and rhythm guitarist for the alternative rock band The Almost. He has also worked with the band The Dangerous Summer. Gillespie also maintains his own solo project and released his debut full-length album, Anthem Song, in 2011. From 2013 to 2016, he was the touring drummer for Paramore.