Vincent Martella
Phineas Flynn / Phineas-2 (voice)

Thomas Brodie-Sangster
Ferb Fletcher (voice)

Dee Bradley Baker
Perry the Platypus / Additional Voices (voice)

Ashley Tisdale
Candace Flynn / Candace-2 (voice)

Dan Povenmire
Dr. Heinz Doofenshmirtz / Doof-2 / Additional Voices (voice)

Richard O'Brien
Lawrence Fletcher / Lawrence-2 (voice)

Jeff 'Swampy' Marsh
Major Francis Monogram / Monogram-2 (voice)

Alyson Stoner
Isabella Garcia-Shapiro / Isabella-2 (voice)

Maulik Pancholy
Baljeet Rai / Baljeet-2 / Additional Voices (voice)

Bobby Gaylor
Buford Van Stomm / Buford-2 (voice)

Mitchel Musso
Jeremy Johnson / Jeremy-2 / Additional Voices (voice)

Tyler Alexander Mann
Carl (voice)

Kelly Hu
Stacy Hirano (voice)

John Viener
Norm / Normbots (voice)

Jack McBrayer
Irving (voice)

April Stewart
Additional Voices (voice)

Ariel Winter
Gretchen / Additional Voices (voice)

Caroline Rhea
Linda Flynn-Fletcher / Linda-2 / Additional Voices (voice)

Diamond White
Additional Voices (voice)

Doris Roberts
Mrs. Thompson (voice)

Fred Tatasciore
Additional Voices (voice)

Grey DeLisle
Additional Voices (voice)

Isabella Murad
Milly (voice)

Jeff Bennett
Additional Voices (voice)

Jaret Reddick
Danny (voice)

Kevin Michael Richardson
Additional Voices (voice)

Laura Dickinson
Vocalist (voice)

Loni Love
Carl in Disguise (voice)

Todd Stashwick
Mr. Johnson (voice)

Slash
Self (uncredited)