Awarded for services to literature and drama, the graphic novelist, originally from Coatbridge in Lanarkshire has written for publications such as 2000AD, Superman, and X-Men. His own creation, Kick-Ass, was turned into a feature film in 2011.
Now splitting his time between Glasgow and Los Angeles, said he was surprised to have been selected for the honour. He said: "These kind of honours you usually see going to other people, so its nice. I got an honorary doctorate last year so I am starting to feel very respectable. I want my kids to write MBE on my father's day card."
On becoming part of the establishment, Millar said: "That is the worry, part of the thing of being a writer is that you should always be on the outside but I suppose these honours are how the establishment tries to embrace everyone."
Miller said he wasn't sure how he would celebrate but may dedicate a drink in the pub to his latest accolade. He said he and his partner Lucy were looking forward to visiting Buckingham Palace. He added: "Lucy is very excited. Women love a nosy around other people's houses and one of the first things she said to be was that she couldn't wait to go down and have a look around the place. I think the whole thing will be worth it for that."
Millar is warming up for the release of Kick Ass 2, starring Jim Carey, with a further project Secret Service also soon coming to fruition.
He said: "I never get a chance to sit back and feel satisfied. I do remember what it is like to be skint when I was 19 and living with my cat. It would eat one day and then I would eat the next."