Prince Harry no doubt knows exactly what it's like to visit the home of his father the King.
But it appears on a previous trip to the US, he also visited the beloved home of another King - Elvis Presley.
In his memoir Spare, Harry recounts a visit to Graceland, Elvis' Tennessee estate, while in America for the wedding of his and Prince William's close pal Guy Pelly to Holiday Inn heiress Lizzy Wilson.
He describes how the wedding party had already been to Miami for Guy's stag party and decided to fly to Tennessee ahead of the wedding to visit Graceland.
Pictures taken at the time show Harry touring the estate alongside brother William and their cousins Princess Beatrice and Princess Eugenie.
But in his memoir, Harry appears to scoff at the estate, which is now a major tourist attraction and said it reminded him of his "badger sett" - a lower ground floor flat he previously lived in at Kensington Palace.
He writes in Spare: "People variously called the house a castle, a mansion, a palace, but it reminded me of the badger sett. Dark, claustrophobic. I walked around saying: The King lived here, you say? Really?
"I stood in one tiny room with loud furniture and shag carpet and thought: The King’s interior designer must’ve been on acid."
Elvis lived at Graceland after buying the estate in 1957 until his death in August 1977 - and he is buried there.
Yesterday, a memorial service was held at Graceland following the death of Elvis' daughter Lisa Marie, who passed away aged 54 earlier this month.
Among those giving a touching eulogy to Lisa Marie was her dear friend and Harry's aunt Sarah Ferguson.
And in her moving speech, Sarah mentioned her late mother-in-law the Queen and referenced her words on grief.
She said: "My late mother-in-law used to say that nothing can be said – can begin to take away the anguish and the pain of these moments because grief is the price we pay for love and how right she was."
Sarah also discussed her bond with Elvis' only daughter as she added: "I stand here with great honour because we called each other sissy. I've been with you all for all your lives."
Lisa's mum, Priscilla Presley, broke the news that her daughter had passed away earlier this month.
"It is with a heavy heart that I must share the devastating news that my beautiful daughter Lisa Marie has left us," she said in a statement.
Spare by Prince Harry and published by Penguin Random House is out now.
