Stoessel's father presented an unrelated project to Disney Channel producers, who later informed him about auditions for the lead role for the network's upcoming television series, Violetta. In late 2011, after an intense casting process, Stoessel obtained the principal role in the series, a tween-oriented musical series launched as a co-production between Disney Channel Latin America, Europe, Middle East and Africa. The show's first season began production in Buenos Aires in 2012. Stoessel played the titular character, Violetta Castillo, during all three seasons of the show. Stoessel sang the series' theme song, "En Mi Mundo", which was later released as a single on 5 April 2012 to promote the show. Subsequently, she recorded the Italian version, "Nel Mio Mondo" and the English version, "In My Own World". Both songs were used as the theme songs for the series in its international broadcasts in Italy, the UK and the U. S. via Netflix. For this role Stoessel won an award for "Female Newcomer" in the 2012 edition of the Kids' Choice Awards Argentina and was also nominated for the U. S. version, the Nickelodeon Kids' Choice Awards, in the "Favorite Latin Artist" category.