Simplify the following text for a Grade 7 native English-speaking person.
Original: However , Oliver did used to have romantic feelings towards Hannah Montana before he knew she was Miley .
Simplified: Lilly finds out that Miley is Hannah Montana in the first episode , when she breaks into Hannah 's dressing room . In the second episode , Oliver 's crush on Hannah Montana is shown , and because of this , Miley tells him her secret .