The comedy writer created the Partridge character together with Richard Herring, Stewart Lee and actor Steve Coogan for radio show On The Hour in 1991.
Partridge has since appeared on TV shows The Day Today, Knowing Me, Knowing You, I'm Alan Partridge and Anglian Lives.
He will also feature in a series of web-episodes presented by the Fosters Funny website from November 5.
"I've been editing the Alan Partridge picture," The Guardian quoted Iannucci as saying.
However, Iannucci clarified on Twitter: "In fact, been editing Mid Morning Matters, Alan P's vodcasts."
He confirmed that Partridge would not move to America in the long-rumoured film and explained: "Taking Alan to the US wouldn't have been a good idea. Alan's thing is that he's delusional in imagining his future is brighter than it ever will be.
"He keeps expecting that, because Keith Chegwin and Tony Blackburn have been brought back to national consciousness with reality TV, he is destined to return too. But he hasn't had that call."