Isabella Castillo Díaz (born 23 December 1994), best known by her stage name Isabella Castillo, is a singer and actress born in Havana, Cuba. Her best known role is that of Graciela "Grachi" Alonso, main character of the Nickelodeon Latin America's series Grachi, for which has released several songs.
Isabella Castillo was born on 23 December 1994, daughter of the singer Delia Díaz de Villegas and the percussionist José Castillo. She has an elder sister, Giselle, a pianist and music teacher. In 1997, at the age of three, she emigrated to Belize, moving to Miami, Florida, some months later. At the age of five she debuted as a singer in one of her mother's concerts: from that moment, she took dancing, singing and acting lessons, studying music at Musical Procenter and winning four times the Grand Prize at the Youth Fair of the Florida International University. On 26 March 2005 she won the first prize as Most Promising in the Children Singing Division at the USA World Showcase and on 15 July she took the stage on the Manuel Artime Theater in Miami in the musical Fantasia en Disney; she also participated in the contest Best New Talent in Los Angeles and in the concert offered by the Israeli Embassy for Cuban people living in the USA. In 2007 she gained the Magnet Outstanding Performance recognition at the South Miami Middle Community School and she was invited to honor the neo-elected president of Israel Shimon Peres. Again in 2007, persuaded by the producer Óscar Gómez, she started an intensive course of acting with the Cuban actress Lili Rentería, preparing for the audition in Madrid for the musical El diario de Ana Frank – Un canto a la vida; moving in Spain with her family, after three rounds of auditions she was given the main role. The musical, which opened on 28 February 2008, won her the Gran Via Award as Best Revelation in a Musical.