[2] The parents of the two sisters, British-born Michael Jaffray King and his German wife Irmgard (also known as Joanna), left India in 1991 and travelled with their children as Christian missionaries in a caravan through Europe and the United States.

He later formed with his five oldest children the Christian band The King Family and they toured through the world performing religious music as street musicians, in clubs, churches, schools and prisons and on TV shows.

[7] When Jazzy and Ruby King turned 15 and 13, now living in Slovakia,[3] they left their family to stay on their own and to sing in a night club,[8] after their oldest brother Michael had already quit the band in 2003.

[9][10] In 2009 the band was invited to Nashville, Tennessee by Doc McGhee (the manager of KISS and Bon Jovi) and the siblings decided to emigrate to the United States.

They were based in Düsseldorf, Germany, at that time and decided to move to England and audition for The X Factor after they heard that Simon Cowell had been back on the judging panel.

At the bootcamp the group sang "I Love Rock and Roll" by Joan Jett and at the judges' houses, which took place in Bermuda, they performed "Gold Digger" by Kanye West.

[23] Their sister Marieangela King married on 1 December 2013 the musician and artist Elijah Blue Allman,[24] the son of singer and actress Cher.