The voice of Dad in Phineas and Ferb is Richard O'Brien.
Thomas Sangster
The voice for Jenny in Phineas and Ferb is Alyson Stoner.
Maulik Pancholy.
Mitchel Musso plays Jeremy
Thomas Sangster plays Ferb.
If you mean Isabella, then the voice of Isabella is Alyson Stoner.
If you meant to type "Phineas" as in the cartoon show "Phineas and Ferb", he is voiced by Vincent Martella.
Thomas Sangster
2007
4
Dee Bradly Baker
The cartoon duo is "Phineas and Ferb."