The band consists of songwriter and vocalist Liz Nistico and producer and multi-instrumentalist Louie Diller, though they often play with more musicians for their live show.

HOLYCHILD formed in college at George Washington University in D.C., where Diller was the musical accompanist for Nistico's modern dance class in 2011.

[11] The duo found early success in 2013 through "Happy With Me", a fierce challenge to media images that received more than 100,000 plays in just one week and placing #1 on Hype Machine's Popular Charts.

Produced by Louie Diller, HOLYCHILD's debut EP, Mindspeak, was released in March 2014 through Glassnote, accompanied by a short film directed by Nistico.

[15] Diller co-produced the LP with Grammy-nominated producers Greg Wells (Katy Perry, Adele) and Cian Riordan (5 Seconds of Summer, Keith Urban).

The single, Rotten Teeth, was released in May 2016 accompanied by a music video directed by Nistico and featuring drag queens and famous Mexican reality and YouTube stars.

On December 18, 2019, the duo announced on social media that their upcoming tour would be their final performances for an "indefinite period of time.