She's just 15 years old, but Miley Cyrus - the daughter of country singer Billy Ray Cyrus - has enough of a life story to warrant a book.

Disney announced yesterday that she'll be writing her autobiography, with the release currently set for spring 2009. That's the same season in which the next Hannah Montana movie is set to debut in theaters. Miley and Billy Ray will be shooting the picture in Tennessee in the coming weeks.

Miley recently had her legal name changed to Miley Ray Cyrus, the middle name a tribute to her father, and the book will continue her celebration of her parents.

"I am so excited to let fans in on how important my relationship with my family is to me," she said in the release. "I hope to motivate mothers and daughters to build lifetimes of memories together and inspire kids around the world to live their dreams."

The New York Times reports the book deal is at least $1 million.