Himself

Luc Robitaille*

Phineas

Vincent Martella

Perry the Platypus (voice) / Dr. Diminutive (voice)

Dee Bradley Baker

Ferb

Thomas Sangster

Candace

Ashley Tisdale

Linda Flynn-Fletcher (voice) / Grandma Betty Joe (voice)

Caroline Rhea

Dad

Richard O'Brien

Isabella Garcia-Shapiro (voice)

Alyson Stoner

Jeremy Johnson (voice)

Mitchel Musso

Dr. Heinz Doofenshmirtz

Dan Povenmire

Francis Monogram (voice)

Jeff 'Swampy' Marsh

Stacy Hirano (voice) / Additional Voices (voice)

Kelly Hu

Major Monogram

Jeff "Swampy" Marsh

Buford Van Stomm (voice)

Bobby Gaylor

Baljeet

Maulik Pancholy

Karl

Tyler Mann

Vanessa

Olivia Olson

Little Suzy

Kari Wahlgren

Carl Karl (voice)

Tyler Alexander Mann

Ferb Fletcher (voice)

David Errigo Jr.

Professor Parenthesis

Paul Reubens

C-3P0

Simon Pegg

Norm (voice) / Norm-C3PO (voice) / Additional Voices (voice)

John Viener

Host

Kelly Osbourne

Grulinda

Elizabeth Banks

Empire Member

Adam Savage

Ed

Nick Frost

Roger Doofenshmirtz (voice) / Ro-juh Doofengung (voice)

John O'Hurley

Napoleon

J.K. Simmons

reporter Don Adaded

George Romero

Wendell

Josh Gad

Empire Member

Jamie Hyneman

Irving (voice)

Jack McBrayer

Additional Voices (voice) / Sally (voice)

Candi Milo

Guest Star

Noah Wyle

Floyd

Stephen Root

Guest Star

Bella Thorne

Monty (voice)

Seth Green

Fireside Girl Gretchen

Ariel Winter

Additional Voices (voice) / Mrs. Pierpoint (voice) / Dr. Gevaarlijk (voice)

Jennifer Grey

Mrs. Feyersied

Cloris Leachman

Michaela Zee

Albert (voice) / Tom Totally (voice) / Captain Dirk Mortenson (voice)

Diedrich Bader

Laura Dickinson

Eileen Galindo

Grey Griffin

Todd Stashwick