Sofia the First is an American animated fantasy children's television series. It follows a young peasant girl named Sofia, who becomes a princess after her mother marries the King of Enchancia. The series pilot premiered on November 18, 2012, on Disney Channel. It aired from January 11, 2013, to September 8, 2018 on Disney Jr. It received some of the highest viewership for a preschool cable television series; at one point, it became the category's most-watched program.