The Phineas and Ferb movie is fast becoming quite a big deal. Earlier this month we learned that Disney had set the feature film adaptation of the popular children’s show for a prime July 26th, 2013 release date. Now 24 Frames reports that Toy Story 3 scribe (and Oscar winner for Little Miss Sunshine) Michael Arndt has come aboard the project to write a draft of the script. The pic was initially scripted by show creators Swampy Marsh and Dan Povenmire, but it looks like it'll be getting a punch up from Arndt. Unlike the television show, which is animated, the feature film will be a mixture of live-action and animation. Arndt was recently set by Disney to pen their period China-set Snow White film Snow and the Seven.

Phineas and Ferb is one of the more popular programs populating the Disney Channel. The show focuses on the misadventures of amateur inventors/stepbrothers Phineas Flynn and Ferb Fletcher. Other characters who populate the series include their sister Candance, always bent on getting the boys in trouble with their mother, and their pet platypus Perry who doubles as a secret agent facing off against the evil Dr. Doofenshmirtz (ah, children’s programming). The feature film has become a priority for Disney, as they’ve recently ramped up merchandising on the Phineas and Ferb brand. Hit the jump to see what all the fuss is about.

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Image via Disney