- “It's a terrible, horrible place, and no one whoever goes there comes out the same!”
- ―Star's fear of St.Olga's
St. Olga's Reform School for Wayward Princesses is an infamous prison-like reform school that appears in the Disney XD animated series Star vs. the Forces of Evil. Many princesses who are reckless beyond control once feared the school greatly, because according to Star Butterfly whoever went there never came out the same.
The institution was known for brainwashing princesses against their will into being mindless, prim and proper ladies. The school also had a magic tower that prevents the use of dimensional scissors, making it almost impossible for students to escape. However, shortly after Marco started off a rebellion, the princesses have seized control of the school, turning it into a "Total Party School". The resulting revolution forced Miss Heinous, the headmistress, to leave. The princesses at the school have lost all respect for authority, started skipping classes just to party, and started fraternizing with princes from a neighboring reform school.
- St. Olga's Reform School for Wayward Princesses is named after the real life saint and princess of the same name, Olga of Kiev.
- In "Party With a Pony", King Pony Head admits that the school is like a prison.