Hannah Montana is an American teen sitcom that was created by Michael Poryes, Rich Correll, and Barry O'Brien, and aired on Disney Channel for four seasons between March 2006 and January 2011. The series centers on Miley Stewart (Miley Cyrus), a teenage girl living a double life as famous pop singer Hannah Montana, an alter ego she adopted so she could maintain her anonymity and live a normal life as a typical teenager. Episodes deal with Miley's everyday struggles to cope with the social and personal issues of adolescence while maintaining the added complexities of her secret identity, which she sustains by wearing a blonde wig. Miley has strong relationships with her brother Jackson and her best friends Lilly Truscott and Oliver Oken, who also become aware of her secret. Cyrus's father, singer-songwriter Billy Ray Cyrus, plays Miley Stewart's father and manager Robby Ray. Overarching themes include a focus on family and friendships, and the importance of music and discovering one's identity.