The Thick Of It star told The Guardian that he will play a headmaster in the show and admitted to feeling old among the young cast.
Addison said: "[I play a] Cameronian control freak - an uptight, smug bully who, it seems to me, is less interested in teaching than in 'fixing' youth.
"I think Skins makes anyone above the age of 23 feel old, and that's one of its great strengths. It's energetic, colourful and full of life in a way that not much drama is on TV these days."
He added: "It's a combination of fun and terrifying to watch if you're out of its immediate demographic - particularly terrifying if you're a parent of teenagers, I should think.
"You are always aware when watching it that it's Not Meant For You."
Skins was recently nominated for a gong at the inaugural CDN Diversity Awards.