William Ryan Key is an American rock musician, best known for being the lead vocalist, songwriter, and rhythm guitarist for the pop-punk music act, Yellowcard. After the band announced their official break-up in 2017, Key remained active in the music scene, producing and working with other artists at his own recording studio. In 2018, he was asked to come on tour with fellow musicians, New Found Glory, to provide additional instrument backing onstage. Key took this opportunity to showcase his new solo material, as the opening act on the tour. The songs were released on his EP Thirteen in 2018, concurrently with the start of the tour. Much like the recorded tracks, his performance consists merely of himself singing and playing an acoustic guitar.

It should be noted that while he was credited as Ryan Key in Yellowcard, he goes by his full name, William Ryan Key, as a solo act.