Twenty One Pilots is an American musical duo formed in 2009 by lead vocalist and multi-instrumentalist Tyler Joseph. The band is known for blending a wide range of genres, including alternative hip-hop, pop, rock, and indie, creating a unique and energetic sound. Their music often explores themes of mental health, self-reflection, and societal pressures, resonating with a broad audience. They gained widespread popularity with hits like "Stressed Out" and "Ride" from their 2015 album Blurryface, which solidified their place in the mainstream music scene.