Grey is an American electronic music duo consisting of brothers Kyle and Michael Trewartha.

[4][5] Brothers Kyle and Michael Trewartha grew up in Fountain Valley, California.

Kyle played guitar in a metal band[6] before releasing original songs and remixes in electronic genres such as dubstep and electro house under the name Singularity from 2011 to 2014.

[9] They officially formed as Grey in 2015, first releasing remixes of “Beautiful Now” by Zedd ft. Jon Bellion and "Where Are Ü Now" by Jack Ü,[9] later remixing songs by artists including Zedd, Selena Gomez, Troye Sivan, Mike Posner and Ariana Grande.

[10] In 2018, they released "The Middle" with Maren Morris and Zedd and signed to Island Records.