Untitled Phineas and Ferb theatrical film

On January 11, 2011, Disney Channels Worldwide chief Gary Marsh announced that a feature film based on Phineas and Ferb was in development by Tron: Legacy producer Sean Bailey. As of September 6, 2011, Dan and Swampy had finished writing the script. In October 2011, the film, tentatively titled simply Phineas and Ferb, was given the release date of July 26, 2013 by Walt Disney Pictures, a slot previously occupied by Thor: The Dark World. On October 27, 2011, it was announced that Michael Arndt, who had written Little Miss Sunshine and Toy Story 3, had been hired to write the draft for the film. The project will now be produced by Mandeville Films. In October 2012, Disney moved the release date to 2014, and in August 2013, the film was removed from its schedule. This led to speculation that it was cancelled, but Swampy Marsh confirmed via Twitter that the film was just on hold. On July 12, 2015, it was confirmed that a form of the script of the film was completed. As of March 2018, there has been no more word on the film's development.

Why It Was Cancelled

 * Phineas and Ferb got cancelled on June 12, 2015.