Robert F. Hughes Director Dan Povenmire Dr. Heinz Doofenshmirtz Director, Voice, Screenwriter Vincent Martella Phineas Flynn Voice Dee Bradley Baker Perry the Platypus Voice Ashley Tisdale Candace Voice Mitchel Musso Jeremy Johnson Voice Alyson Stoner Isabella Voice Thomas Brodie-Sangster Ferb Fletcher Voice Caroline Rhea Linda Flynn-Fletcher Voice Richard O'Brien Lawrence Fletcher Voice Jon Colton Barry Screenwriter Jeff "Swampy" Marsh Screenwriter Danny Jacob Original Music Ted Supa Film Editing Sara Goldberg Casting Alan Bodner Art Director Jill Daniels Art Director