| Look at you! You're just a bottom!
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- Vincent Martella as Phineas
- Ashley Tisdale as Candace
- Thomas Sangster as Ferb
- Caroline Rhea as Mom
- Mitchel Musso as Jeremy
- Dan Povenmire as Dr. Doofenshmirtz (cameo)
- Jeff "Swampy" Marsh as Major Monogram (cameo)
- Richard O'Brien as Dad
- Dee Bradley Baker as Perry
- Maulik Pancholy as Baljeet
- Kelly Hu as Stacy
- Geraldo Rivera as Morty Williams
- Clancy Brown as Dream Sergeant
- Additional voices: Dee Bradley Baker, April Winchell