Prince Harry has begun legal action against the owners of newspapers the Sun and the Daily Mirror, in relation to alleged phone-hacking.
Documents have been filed on behalf of Prince Harry over the alleged illegal interception of voicemail messages.
His wife, Meghan, recently launched legal action against the Mail on Sunday.
It is accused of unlawfully publishing a private letter to her father.
The BBC has not yet established when the allegations date from.
Referring to his late mother, Diana, Princess of Wales, the prince said his "deepest fear is history repeating itself".