Michael Jackson's parents have promised to adopt his children if he loses custody of them.
They have also insisted their son is innocent of child sex abuse allegations.
Joe and Katherine Jackson said they would fight any attempt by the authorities to have his three children removed from the family.
They said prosecutors were trying to humiliate their pop star son.
In an interview to be screened on ITV1 next Monday, Joe Jackson said: "We're not going to let nobody take those kids."
Michael Jackson has two children, Prince Michael I, six, and Paris, five, from his three-year marriage to Debbie Rowe. He also has a baby, Prince Michael II, with a surrogate mother.
