The Disney star is currently promoting the release of Hannah Montana: The Movie, the first big-screen adventure featuring her hit sitcom character.
"I think after people see the movie, they'll see it's really what I love," Cyrus told People. "It's my main passion."
Describing the project as "a good first step" to being taken seriously as an actress, she added: "It's allowing the fans to continue to stay with me and not go too far too soon, but also be able to do something that I really love, and that's film."
Cyrus's latest movie project is The Last Song, which follows a rebellious teenager who reunites with her estranged father on a summer break.
Discussing the project, she explained: "Right now I'm working on a movie with Nicholas Sparks, which is what I want to continue to do - to do drama."