In 2016 he wrote/directed his first feature film, The Cleanse, starring Johnny Galecki, Anna Friel, Anjelica Huston, and Oliver Platt.
[2] It world premiered at SXSW 2016 and was named one of "7 Hidden Gems in the 2016 Features Lineup" by Indiewire.
[4] He was also a co-writer for the Summer Camp Island episode "Time Traveling Quick Pants".
He also directed and executive produced Critters Attack!, a reboot of the cult horror franchise for Warner Brothers Home Video/SyFy, which was released in the summer of 2019.
Miller is married to animator Daron Nefcy, known for creating the Disney XD cartoon Star vs. the Forces of Evil.