Twenty One Pilots is an American musical duo formed in Columbus, Ohio, in 2009. The band consists of two members: Tyler Joseph (vocals, piano, bass, and synthesizers) and Josh Dun (drums and percussion). Twenty One Pilots is known for its eclectic sound, combining elements of pop, rock, hip-hop, and electronic music. Here are some key points about the duo:

1. Formation: Twenty One Pilots was formed by Tyler Joseph, who initially played with multiple other musicians before Josh Dun joined the band in 2011.
2. Self-Titled Album (2009): The duo released their self-titled debut album in 2009, which gained them some local recognition in the Columbus music scene.
3. "Regional at Best" (2011): In 2011, they released the album "Regional at Best," which featured tracks like "Guns for Hands" and "Car Radio." The album was self-released and served as a stepping stone in their career.
4. Breakthrough with "Vessel" (2013): Twenty One Pilots gained widespread recognition with their third album, "Vessel," released in 2013. The album included hit singles like "Holding On to You" and "Car Radio." It was their first release on a major label.
5. "Blurryface" (2015): The duo's fourth album, "Blurryface," was released in 2015 and became a major commercial success. It featured hit singles like "Stressed Out," "Ride," and "Tear in My Heart." The album won a Grammy Award for Best Pop Duo/Group Performance for "Stressed Out."
   
6. "Trench" (2018): In 2018, Twenty One Pilots released "Trench," which was a concept album set in a fictional city called Dema. The album included tracks like "Jumpsuit" and "Nico and the Niners."
   
7. "Scaled and Icy" (2021): The duo's sixth album, "Scaled and Icy," was released in 2021 and marked a departure from their previous sound. It featured tracks like "Shy Away" and "Choker."
   
8. Eclectic Sound: Twenty One Pilots' music is known for its genre-blending approach, incorporating elements of pop, rock, rap, and electronic music. Tyler Joseph's introspective lyrics are a prominent feature of their songs.
   
9. Live Performances: The duo is known for their energetic live performances, which often include theatrical elements and audience engagement.
10. Influences: Their music draws inspiration from a wide range of genres and artists, and they often incorporate elements of conceptual storytelling into their work.
    

Twenty One Pilots' unique blend of musical styles, introspective lyrics, and thematic storytelling has made them a prominent and influential act in the alternative and pop music scenes. Their ability to resonate with a broad audience and evolve their sound over the years has solidified their place in contemporary music.