[1][2] In this season, Mitchel Musso's character Oliver Oken becomes a recurring character, and is no longer in the main cast due to Musso preparing for the Disney XD series Pair of Kings.

[6][7] In season 4, Mitchel Musso was not a part of the main cast; he appeared instead in a recurring role.

They include Ray Liotta, Angus T. Jones, Sheryl Crow, and Christine Taylor.

[10] Recurring and guest cast include: Tammin Sursok as Siena, Cody Linley as Jake, Dolly Parton as Aunt Dolly, Vicki Lawrence as Mamaw Ruthie, Shanica Knowles and Anna Maria Perez de Taglé as Amber and Ashley, and Drew Roy as Jesse.

"Are You Ready", "Ordinary Girl", "I'm Still Good", "Que Sera", and "Gonna Get This" were used to promote season four of Hannah Montana.