The acclaimed writer was granted the title in recognition of his contribution to popular culture and national literacy, reports downthetubes.net.
"There's one thing in particular about this that delights me - the appointment is intended to help raise the profile of British comics, British creators and what we can achieve in the comic media in Britain," Mills said.
"For too long we've been in the shadow of American comics as well as being rather looked down upon as an art form in the UK - certainly by comparison with France. As a result, we have run the risk of losing our very British comic identity."
He added: "If this enhances the public image of important series like Charley's War, comics like 2000AD, and also my forthcoming graphic novels with Clint Langley for British-based Repeat Offenders Ltd., that's got to be a good thing for our industry."
Mills is holding a series of lectures on graphic novels at Liverpool University as well as editorially advising its new media incubator Subversion.