Twenty One Pilots is an American musical duo from Columbus, Ohio, formed in 2009. Their work blends elements of alternative rock, pop, hip hop, electropop and indie, often characterized by genre-crossing arrangements, introspective and candid lyrics, and dynamic shifts between rapped verses and sung choruses. The band gained mainstream recognition in the 2010s, notable for theatrical live performances that incorporate theatrical costuming and high-energy stagecraft. Their music frequently addresses themes of mental health, self-reflection and emotional struggle, delivered through accessible melodies, rhythmic experimentation and a mixture of electronic and live instrumentation.