1. Tyler Joseph, Josh Dun are from Ohio.
2. The name “Twenty One Pilots” is inspired by Arthur Miller play All My Sons, in which 21 pilots are killed.
3. The music video for ‘House of Gold’ was partially shot on actor Will Smith’s ranch in Los Angeles.
4. They are the third duo in history to have two singles simultaneously chart in the top five of the Billboard Hot 100, following OutKast and Macklemore & Ryan Lewis.
5. They're Christian - both members attended a Christian school, and Tyler interned at a church.
6. Their ski masks were used as an "alternate persona" and to encourage fans to connect with the music.
7. They've undergone major line-up changes.
8. Josh Dun unexpectedly discovered he could backflip during a soundcheck and now does it at every show.
9. Twenty One Pilots became the third rock act to have two singles simultaneously chart in the top five of the Billboard Hot 100, only after the Beatles and Elvis Presley.
10. Apart from Twenty One Pilots, Tyler has also had a solo project where he released an album entitled "No Phun Intended,"
11. Tyler Joseph was working at a Killers concert back in 2009, about to clean up when he said: “You know what, I want to be the next Brandon Flowers”. Steinecker claimed: “Rather than raking the lawn, he quit.”
12. Every time the duo are asked how they met in an interview, they make up a different version.
13. The fifth single "Car Radio," from their third album "Vessel," has a unique story to it, as Tyler wrote it one night when his car's GPS was stolen, along with the radio.
14. Their self-titled debut album, and the only album to feature bassist Thomas and drummer Salih, was recorded in Tyler's basement. All the songs were written by Tyler himself. The album peaked at number 139 on the U.S. Billboard 200.
15. Tyler played basketball growing up, as his parents hoped it would get him a scholarship to college. In an interview with Alternative Press, he said his parents would request he make 500 shots before dinner, as he was homeschooled and felt basketball became part of his education. Tyler was eventually offered a scholarship to Otterbein University, which he turned down to pursue music instead.
16. They’re open to the idea of adding additional members.
17. The two old men on the cover of the ‘Vessel’ album are actually both Dun’s and Joseph’s paternal grandfathers.
18. They can imagine themselves still in the group 40 years from now.
19. Tyler married his longtime girlfriend Jenna Black on March 28, 2015, after becoming engaged on July 8, 2014.
20. Tyler Joseph’s favourite movie is Donnie Darko and Josh Dun’s is Fight Club.
21. They avoid Twenty One Pilots fan fiction - it's a slippery slope once you head down the reddit rabbit-hole...