Opened in 1990, Ysgol Glanaethwy is a performing arts school that operates outside normal school hours. Younger children take acting lessons and choir practice and the older pupils have choir practice only.
The school became well known when its choir for older pupils took part in the UK TV channel BBC 1's Last Choir Standing show in 2008. The students went through auditions, callbacks, and knock out rounds. After being in the sing off once and chosen to continue by the judges, the choir won second prize in the phone-in vote for the final.
In 2015 Côr Glanaethwy also reached the live finals of Britain's Got Talent, finishing in third place.