| characters |
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| Series Regulars | |||
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| Maulik Pancholy | Maulik Pancholy as Baljeet | Kelly Hu | Kelly Hu as Stacy |
| Vincent Martella | Vincent Martella as Phineas Flynn | Thomas Sangster | Thomas Sangster as Ferb Fletcher |
| Ashley Tisdale | Ashley Tisdale as Candace Flynn | Caroline Rhea | Caroline Rhea as Linda Flynn-Fletcher |
| Alyson Stoner | Alyson Stoner as Isabella Garcia-Shapiro | Mitchel Musso | Mitchel Musso as Jeremy Johnson |
| Richard O'Brien | Richard O'Brien as Lawrence Fletcher | | |
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| Recurring & Guests | |||
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| Ariel Winter | Ariel Winter as Gretchen | | |