Priscilla Presley has blasted claims Riley Keough is the biological mother of John Travolta's teenage son

In a statement, Riley's grandmother Priscilla's attorney Marty Singer said: "Brigitte Kruse, Kevin Fialko, and their co-conspirators have demonstrated that there is no bar too low, no ethical line that they are unwilling to cross in an effort to cause further pain to Priscilla Presley and her family.

"In a completely improper effort to exert undue pressure on Presley to retract her legitimate, truthful claims, Kruse and her co-conspirators have also sued Presley's son, cousin, and assistant.

"These recent outrageous allegations have absolutely nothing to do with the claims in this case.

"The conduct of Kruse, Fialko and their new lawyers (they are on their fourth set of attorneys) is shameful, and it absolutely will be addressed in court."

Riley has two children with her husband Ben Smith-Peterson - three-year-old daughter Tupelo, and a second child born earlier this year whose name has not been made public.

John and Kelly welcomed Benjamin, now 15, into the world in November 2010, a year after their firstborn Jett Travolta died aged 16 from a seizure, while they also have daughter Ella Bleu Travolta, 25, together.

In 2011, John called his birth a "miracle", and told PEOPLE magazine: "He's given the house a renewed spirit and purpose."

Kelly, died in July 2020 aged 57, and her husband has promised he would be candid about her death when it comes to his children.

Appearing on Hart to Heart in 2021, he recalled telling his son: "'Ben, you always love the truth and I'm going to tell you the truth about life.

"'Nobody knows when they're going to go or when they're going to stay.

"'Your brother left at 16. Too young. Your mother left at 57 and that was too young. But who's to say?' "