When did Miley Cyrus get her nickname Miley?

Explanation

Miley Cyrus’ birth name is Destiny Hope Cyrus. In January 2008, she legally changed her name from Destiny Hope Cyrus to Miley Ray Cyrus. "Ray" is in memory of her grandfather, Ronald Ray Cyrus, whom she was very close to and "Miley" came from her childhood nickname "Smiley", which was shortened to "Miley", that was given to her because of her constant smiling as a young child.