Question: At what age did the author of Miles to go start Hannah Montana?

full_context: Document 1: My Story (Dannii Minogue book): My Story is a memoir by Australian singer Dannii Minogue. Written in the United Kingdom and Australia with the help of long-time friend Terry Ronald, the book was released in September 2010 in the UK and in October 2010 in Australia.
Document 2: The Time of Our Lives (EP): The Time of Our Lives is the first extended play (EP) by American recording artist Miley Cyrus. The EP was released on August 28, 2009 by Hollywood Records, initially as a United States' Walmart exclusive. With alterations in artwork and track listing, an international edition was issued November 9, 2009. "The Time of Our Lives" was conceived as a release to accompany Cyrus' newly launched apparel line with Max Azria. The tracks on the EP were primarily composed by John Shanks and Dr. Luke, who also produced their respective cuts. Cyrus co-wrote one out of seven songs on "The Time of Our Lives"; one is a cover and another is a live rendition. Musically, the uptempo tracks on the record are in the pop rock and dance-pop genres while ballads are largely soft rock. Lyrically, it explores the themes of romantic relationships, among other subjects.
Document 3: Ellen Miles: Ellen Miles is an American author, the writer of the Puppy Place and Kitty Corner series of children's books. She was born in New York City, on April 8, 1957 and now lives in Vermont. Several of her stories have been translated into French and Spanish. Her website is called ellenmiles.net. She writes for scholastic books. She grew up in New York. Her books include these fictional people: Charles and Lizzie Peterson (brother and sister in Puppy Place books), their parents and little brother Adam (a.k.a. the Bean). In the Kitty Corner books: Mia Battelli, her brother, and her parents.
Document 4: Miley Cyrus: Cyrus auditioned for the Disney Channel television series Hannah Montana when she was eleven years old. She auditioned for the role of the title character's best friend, but was called to audition for the lead role instead. Despite being denied the part at first because she was too ``young and small ''for the role, she was selected later as the lead because of her singing and acting abilities. The series premiered in March 2006 to the largest audience for a Disney Channel program, and quickly ranked among the highest - rated series on basic cable. The instant success of the series led to Cyrus being labeled a`` teen idol''. She toured with The Cheetah Girls as Hannah Montana in September 2006, performing songs from the show's first season. Walt Disney Records released a soundtrack credited to Cyrus' character in October of that year. The record was a commercial success, topping the Billboard 200 chart in the United States; it went on to sell over three million copies worldwide. With the release of the soundtrack, Cyrus became the first act within The Walt Disney Company to have deals in television, film, consumer products, and music. She had a two - year relationship with actor Tyler Posey. Cyrus has stated that she dated singer and actor Nick Jonas from June 2006 to December 2007, claiming they were ``in love ''and began dating soon after they first met. Her relationship with Jonas, as well as her`` spoofing'' fellow Disney alums Selena Gomez and Demi Lovato, attracted considerable media attention. Cyrus came out as pansexual to her mother when she was 14, and has said: ``I never want to label myself! I am ready to love anyone that loves me for who I am! I am open. ''
Document 5: Who Said: "Who Said" is a pop song by American recording artist and actress Miley Cyrus. She is performing as Hannah Montana – the alter ego of Miley Stewart, a character she plays on the Disney Channel television series "Hannah Montana". The song was written by Matthew Gerrard, Robbie Nevil, and Jay Landers and produced by Gerrard. It was released on July 11, 2006 by Walt Disney Records as a promotional single from the series' first soundtrack, "Hannah Montana". "Who Said" bears teen pop aspects musically, while its lyrics are about individualism.
Document 6: Breakout (Miley Cyrus album): Breakout is the second studio album by American recording artist Miley Cyrus, released on July 22, 2008 by Hollywood Records. It is her first record that is not affiliated with the television series "Hannah Montana", in which Cyrus portrays the title character Hannah Montana. She co-wrote eight of its thirteen tracks, several of which with the assistance of Antonina Armato and Tim James. The majority of the record was composed as she traveled during her headlining Best of Both Worlds Tour (2007–08). Overall, "Breakout" is dominant on pop rock but explores a variety of other musical genres. Lyrical themes addressed in the album relate to breakups and coming of age. An international version was reissued on September 1, 2008.
Document 7: Hannah Montana (season 2): ``I Want You to Want Me... to Go to Florida ''features the ballad`` Ready, Set, Do n't Go'' by Billy Ray Cyrus. It details his feelings concerning his daughter Miley's move to Los Angeles to star in Hannah Montana, while he stayed behind in Nashville. The episode also features the song ``If Cupid Had a Heart '', by Julie Griffin, and written by Gordon Pogoda. Mikayla (Selena Gomez), lip - syncs it in the episode. A soundtrack for the season featuring 10 songs sung by Miley Cyrus as Hannah Montana was released on June 26, 2007.
Document 8: Gonna Get This: "Gonna Get This" is a pop song by American singer-songwriter and actress Miley Cyrus, performing as Hannah Montana – the alter ego of Miley Stewart – a character she plays on the Disney Channel television series "Hannah Montana". It also features vocals from R&B singer Iyaz. It was released to Radio Disney on September 24, 2010 as promotion for the fourth season of "Hannah Montana". The song is musically dance-pop based. The song was later released on October 5, 2010 through iTunes as a single from the soundtrack of the same title as the special title ("Hannah Montana Forever") of the fourth and final season of the series.
Document 9: Buck: A Memoir: Buck is a memoir by MK Asante, published by Random House/Spiegel & Grau. "Buck" tells the story of MK's youth growing up in Philadelphia from the perspective of MK as a teenager. Buck illustrates Asante's struggles with the disintegration of his family and the city's urban decay. Buck is often described as inspirational because it details Asante's discovery of his talent for writing at 16 and his decision to pursue it as a career. The paperback edition of "Buck" made the "Washington Post" Bestseller List in 2014 and 2015.
Document 10: 7 Things: "7 Things" is a song by American singer Miley Cyrus. The song was co-written by Cyrus, Antonina Armato and Tim James, and produced by John Fields. It was released on June 17, 2008 by Hollywood Records as the lead single from the first studio album released by Cyrus with no ties to her character Hannah Montana from the Disney Channel comedy series of the same name. Also registered as "Seven Things I Hate About You", Cyrus developed the song during the Best of Both Worlds Tour while feeling numerous emotions for an ex-boyfriend, mainly anger. The song's release brought allegations that it was about Nick Jonas of the Jonas Brothers, which Cyrus neither confirmed nor denied. Musically, "7 Things" bears aspects of both country and pop punk, while the lyrics in the song's refrain list seven traits Cyrus hates about an ex-boyfriend.
Document 11: Mileo: Mileo was born in Sydney, Australia. His father was born in Oslo, Norway and his mother from Asia. He has stated that when he was younger he was different from most kids his age, having always been very ambitious. Mileo began singing at a young age, and taught himself piano. He began songwriting and later producing around the age of 14 years. Mileo finished high school, later studying at college and graduating before the age of 18.
Document 12: Hannah Montana (soundtrack): Hannah Montana is the soundtrack album for the first season of the television series "Hannah Montana", released on October 24, 2006 by Walt Disney Records. The program itself premiered through the Disney Channel on March 24, 2006; after becoming an immediate commercial success, production on its soundtrack began the following month. Eight of its thirteen tracks are performed by the series' primary actress Miley Cyrus, and are credited to her character Hannah Montana. The groups The Click Five, Everlife, B5, and recording artist Jesse McCartney each contribute one recording, while a duet between Cyrus and her father Billy Ray Cyrus is included as the final track. "Hannah Montana" was reissued as a two-disc special edition on March 20, 2007. The soundtrack was further promoted during the Cheetah Girls' Party's Just Begun Tour, for which Cyrus served as an opening act, and her own Best of Both Worlds Tour.The soundtrack is primarily a teen pop record, which sees additional influences from pop rock and country pop musical styles. The lyrical themes revolve largely around "girl power", teen romance, and the double life that Cyrus' character lives on the program.
Document 13: Being Nikki: Being Nikki was written by author of the Princess Diaries series Meg Cabot, and is the second book in the Airhead series. This book is followed by "Runaway".
Document 14: Miles to Go: Miles to Go is an autobiography by Miley Cyrus, co-written by Hilary Liftin and published by Disney Hyperion in March 2009. The memoir discusses Cyrus' relationship with her parents, her thoughts on the media, her love life, her future ambitions and milestones she still has to reach in her life. "Miles to Go" reached #1 on the "New York Times" children’s best seller list. A second edition to the book was released in Australia in December 2009 and in the UK on 1 March 2010.
Document 15: Hannah Montana (season 1): The first season of the television series Hannah Montana was aired on Disney Channel from March 24, 2006 to March 30, 2007, and included 26 episodes. It introduces the five main characters of the series and Miley Stewart's situation of living a secret double life as a teen pop star. The season also introduces several significant recurring characters such as Roxy Roker, Jake Ryan, and Rico Suave.
ground_truth: eleven years old
sub_queries: Miles to Go >> author Answer: Miley Cyrus
what age did Miley Cyrus start hannah montana Answer: eleven years old