Miley Ray Stewart is a fictional character and central protagonist of the Disney Channel television series Hannah Montana, portrayed by Miley Cyrus. She first appeared on television in the pilot episode "Lilly, Do You Want to Know a Secret?" on March 24, 2006, and made her last appearance on the series finale "Wherever I Go" on January 16, 2011. The character also appeared in the 2009 feature film Hannah Montana: The Movie. Miley is a normal teenage girl who, as her alter ego Hannah Montana, secretly leads a double life as a world-famous pop star.

An alter ego means an alternate self, which is believed to be distinct from a person's normal or true original personality. Finding one's alter ego will require finding one's other self, one with a different personality. Additionally, the altered states of the ego may themselves be referred to as alterations.