Dan and Kevin Hageman are the original screenwriters of the Ninjago series.
- They have an official Twitter account.
- Dan is the older brother and Kevin is the younger one. Dan is the one usually seen with a beard, while Kevin is beardless.
- On December 10, 2018, the Hageman Brothers announced that they are no longer writing for Ninjago and that Bragi Schut is their successor.