- Heihei as Greg Heffley
- Pua as Rowley Jefferson
- RJ (with Verne and Hammy) (from Over the Hedge) as Roderick Heffley
- Tui as Mr. Jefferson
- Sina as Mrs. Jefferson
- Blu (from Rio) as Frank Heffley
- Jewel (from Rio) as Susan Heffley
- Flounder (from The Little Mermaid) as Manny Heffley
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