- Not to be confused with Star World.
World Star (known as World 9) is the first special world and the ninth world in Super Mario 3D World. It 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, a Captain Toad course, and a Sprixie House. Upon completing World 
Star-2, Rosalina becomes available as a playable character. After completing Cosmic Cannon Cluster and collecting the necessary amount of green stars, stamps, and gold flags, the rocket to World 10 will be available.
Levels
| Level Number | Level Name | Preview | Description |
|---|---|---|---|
| World Star-1
|
Rainbow Run | 
|
A space course with Skipsqueaks and rainbow-colored pathways. |
| World Star-2
|
Super Galaxy | File:Rosalina SM3DW.png | A course based off and themed around Super Mario Galaxy. Rosalina is unlocked as a playable character upon completion of this level. |
| World Star-3
|
Rolling Ride Run | 
|
A wooden-themed course with rolling cylinders. |
| World Star-4
|
The Great Goal Pole | File:Great Goal Pole Screenshot - Super Mario 3D World.jpg | A sky course with a winged Goal Pole. The pole starts out at the beginning of the level, but it starts flying away so the player must chase it down. |
| World Star-5
|
Super Block Land | 
|
A grassland formed by giant blocks. |
| World Star-6
|
Honeycomb Starway | 
|
A space course with top-bottom view, featuring "honeycomb" platforms. |
| World Star-7
|
Gargantuan Grotto | 
|
A jungle with Big Galoombas and Mega Mushrooms. |
| World Star-8
|
Peepa's Fog Bog | 
|
An indoors snowy ghost house course with fog. |
| World Star-9
|
Cosmic Cannon Cluster | 
|
A futuristic space course with the cannon boxes. |
World Star- Captain Toad
|
Captain Toad Takes a Spin | 
|
The Captain Toad course of World Star, where he can rotate the stage. |
World Star- Sprixie House
|
Sprixie House | A Sprixie in the Sprixie House gives the player a stamp. |
