Prince Harry is expected to return to the UK for the first time since stepping down as a senior royal to attend the funeral of his grandfather.
Harry - the Duke of Sussex - is likely to be attending the event at St George's Chapel, Windsor, although there has been no word whether heavily-pregnant Meghan Markle would join him, sources told the New York Post.
She is due to give birth to their second child this summer.
Prince Harry and his family were set to reunite for the unveiling of his late mother Princess Diana's memorial statue in July. But Philip's passing may have sped up his plans.
"Harry was extremely close to his grandfather," the royal source told the New York Post.
"He will, of course be there, no matter how difficult relations are between the Sussexes and the family."
It is thought he will be tested for COVID-19 before departure from the US and upon arrival instead of being subject to the normal 10-day quarantine.
The Duke and Duchess of Sussex marked the passing of Prince Philip with a message on their website.
"In loving memory of His Royal Highness The Duke of Edinburgh, 1921-2021. Thank you for your service. You will be greatly missed," the pair wrote on Archwell.