Austin the Smart (formerly known as Just Austin) is a Luau Brother. He is known for immediately coming up with brainy ideas. Austin the Smart is also very gentle and sensitive. After hearing Volcano Sisters Uniqua and Tasha sing about wanting something from the Luau Brothers, he instinctively figured out that they wished to join them for a luau.
Austin the Smart is primarily purple. He wears a light blue Hawaiian wrap decorated with a white floral pattern. He also wears gray bracelets on his wrists.
Austin has played Austin the Smart in one episode of The Backyardigans: "The Legend of the Volcano Sisters" from season two.