|PIC1|Miley Cyrus, 15-year-old teen star who attributes her family and Christian faith for keeping her grounded in her fast-pace lifestyle, will write about her life before becoming Hannah Montana in a book deal that was confirmed by the publisher for Disney on Tuesday.

In her memoir, a reportedly seven-figure deal, the star of hit Disney Channel series "Hannah Montana" will write about her early life in Tennessee and the excitement of making it big on TV, music and film.

The teen star will also open up about the positive impact her relationship with her family - particularly her mum Leticia - had on her.

"I am so excited to let fans in on how important my relationship with my family is to me," said Cyrus 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."

The book also gives readers a look at her personal photos and "her inner circle of loved ones", according to Disney. It will be published in early spring 2009, around the same time "The Hannah Montana Movie" is expected to debut.

Whilst serving as a role model for young teen girls with her squeaky-clean image, Cyrus also uses her fame to witness for Christ.

The bubbly teen has made her Christian faith no secret on camera.

When interviewed by Barbara Walters for an Oscar night celebrity special, she credited her family and faith for keeping her grounded and protected from the materialism and partying that usually dominate a teen star's lifestyle.

"Some people don't have a family to fall back on, like I have, and that's when something greater than even that comes in - and that's faith and that's what I have for me," she told Walters, according to ABC News. "That's what keeps me strong."

On her Easter instalment of her YouTube show, "The Miley and Mandy Show", Cyrus and her best friend Mandy Jiroux dedicated their video to Jesus.

"Jesus rocks! That's why we do what we do," said the "Hannah Montana" star. "She (Mandy) dances for Jesus. I sing, dance and act for Jesus! ... Now that I think about it, I do everything for Jesus. We make the YouTube videos for Jesus. We're all about it."

Cyrus regularly attends a church in Montrose, California, where she reportedly puts as much as $1,000 in the offering baskets.

In recent days, two pictures showing a girl who resembles Cyrus flashing some skin hit the Internet and have generated buzz among critics. It is uncertain whether the pictures are of the teen star or if they are part of a smear campaign. Cyrus' camp has yet to respond.

In the Disney channel show, Cyrus plays a high school teen with an alter-identity as a pop singer. Her real dad Billy Ray Cyrus, the country singer who is known for the single "Achy Breaky Heart", plays her television dad on the show. For two years, the show has maintained the No 1 spot for series among kids ages 6 to 14 on US cable TV.

Her "Hannah Montana" character has spawned one successful project after another, including a top-grossing, sold-out tour last year; a No. 1 3-D film based on the tour; and several music albums.