The Wrecking Ball singer - who shot to fame aged 12 after starring in Disney TV show Hannah Montana - is no longer interested in appearing in movies because she hates having to pretend to be someone else.
She said: "I'm just not passionate about acting, because I don't like to pretend to be somebody I'm actually not.
"Why should I put on strange characters? I prefer to show my true colours as the real Miley Cyrus."
The 21-year-old star also spoke out to demand more "tolerance" in the world and admitted she doesn't understand how discriminatory attitudes are still held in the modern world.
Speaking to Germany's Vogue, she said: "I think a lot about politics. Despite the fact that it's the 21st century and America is so proud of being a free country, sometimes incomprehensible things happen in our society.
"There is racism and discrimination. I fight against that. I demand more tolerance, especially for homosexuals, who of course should be allowed to marry."
