In 1995, Nelson Mandela, a Nobel Peace Prize winner and the first democratically elected president of South Africa, published a 625-page memoir, which he began writing during his 27-year prison term under his country's apartheid regime.

Miley Cyrus at the 50th Annual Grammy Awards.

By those standards, the forthcoming memoir of 15-year-old Hannah Montana star Miley Cyrus, announced this week by Disney-Hyperion Books, should top out at about three pages.

The as-yet-untitled book, scheduled to hit bookshelves next spring, will tell the amazing story of Cyrus' "life from her roots in the Southern US to Hollywood celebrity and will feature photographs from her famous family."

Cyrus is the daughter of country singer Billy Ray Cyrus, most noted for his 1992 hit "Achy, Breaky Heart." But according to a new People.com report on the richest teen celebrities, Miley is already worth more than her father. The hugely popular Hannah Montana franchise will be worth a projected $1 billion by the end of 2008.

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

Hannah Montana ranks first among TV series on US cable television for children aged 6 to 14 and reaches more than 164 million viewers worldwide, according to Disney.