Dan Povenmire Dr. Heinz Doofenshmirtz Creator, Voice Jeff "Swampy" Marsh Major Monogram Creator, Actor, Voice Vincent Martella Phineas Flynn Voice Thomas Brodie-Sangster Ferb Fletcher Voice Ashley Tisdale Candace Flynn Voice Caroline Rhea Linda Flynn-Fletcher Voice Richard O'Brien Lawrence Fletcher Voice Dee Bradley Baker Perry the Platypus Voice Mitchel Musso Jeremy Voice Alyson Stoner Isabella Garcia-Shapiro Voice Maulik Pancholy Baljeet Voice Kelly Hu Stacy Voice Tyler Mann Carl Voice Olivia Olson Vanessa Doofenshmirtz Voice Kari Wahlgren Susy Johnson Voice David Errigo Jr. Actor Zac Moncrief Director