World Star is the ninth world and the first Special World in the game Super Mario 3D World. It can also be numbered World 9, if you would prefer to go with the typical world numbering system.
World Star takes place above the Sprixie Kingdom, and can only be accessed by completing World Bowser, and taking the Rocket in World 1 which was built by the Sprixie Princesses. It contains nine standard courses and a Captain Toad course. Rosalina is unlocked as a playable character after completing Super Galaxy. After completing Cosmic Cannon Cluster and collecting the necessary amount of Green Power Stars, Stamps, and Gold Flags, the Rocket to World Mushroom will be available. In the background, the Sprixie Homeworld can be seen.
- World Star-1: Rainbow Run
- World Star-2: Super Galaxy
- World Star-3: Rolling Ride Run
- World Star-4: The Great Goal Pole
- World Star-5: Super Block Land
- World Star-6: Honeycomb Starway
- World Star-7: Gargantuan Grotto
- World Star-8: Peepa's Fog Bog
- World Star-9: Cosmic Cannon Cluster
- World Star-Toad: Captain Toad Takes a Spin