Lucas Lex, real name Jack Sadlier, has released music since at least 2017 via SoundCloud.. Their music spans the genres of indie rock, pop, rap, and digicore. Lucas was formerly a member of the collective Dollhaven Eternal Autumn.

In 2019, their cover of Frank Sinatra’s “Fly Me To The Moon” became a viral hit on TikTok. Their debut album, Spider, was released in September of 2020, followed by their sophomore project, CASTLE, on September 10th, 2021.

Since 2022, Sadlier has abandoned the Lucas Lex alias and currently releases music as Fairys.