The project consisted of American performance artist Hayden Dunham, English producers A. G. Cook and Sophie, and British singer Harriet Pittard.

[1] The single's release was accompanied by a photo of QT with a blonde wig trimmed into a messy bob cut.

[4] "Hey QT" is a dance-pop song composed in the key of F major, with a tempo of 129 beats per minute.

[4] Although Dunham portrays QT, the song's vocals are actually by British singer Harriet Pittard, who also records as Zoee.

[12] The song was debuted at a Boiler Room show in Los Angeles promoting Hudson Mohawke's Chimes EP.

[14] Diplo premiered his remix of "Hey QT" on 6 March 2015 through Annie Mac's BBC Radio 1 show.