George Ryan Ross III (born August 30, 1986) is an American musician, singer, and songwriter best known for his work as the former lead guitarist, backing and lead vocalist, and primary songwriter of the American rock band Panic! at the Disco before his departure in 2009. He alongside former Panic! bassist Jon Walker formed the Young Veins later that same year, in which Ross was the lead vocalist and guitarist. They broke up in 2010.

Source: Wikipedia (https://en.wikipedia.org/wiki/Ryan_Ross)