One insider made a brutal joke about Prince Harry, according to author Tom Quinn's upcoming new royal book.

The Duke of Sussex, who is currently in Canada for the Invictus Games, stepped down as a senior working royal in 2020 and now resides in California with his wife Meghan and two children.

Likening Harry to a popular television character, the insider added: "The joke used to be that Harry was very much like the Prince Regent in the Blackadder television series."

In an extract of the book released by The Times, the insider joked that Harry wouldn't be able to do anything without the help of a servant - and even joked about Harry's temperament.

The insider joked: "People used to say that without a servant, Harry would take two weeks to put his own trousers on."

As reported by the Mirror, The Prince Regent character was played in the series by Hugh Laurie. In one episode does take a whole week to put on his own pair of trousers.

The book, which is titled Yes, Ma'am – The Secret Life of Royal Servants, will be released on February 27.

It also discusses Meghan Markle, who has been married to Harry since 2018.

It said that Meghan felt that her husband was being "belittled" by the royals due to the property he'd been given to live.

The book read: "'Meghan felt it was so small that it must be a reflection on how the Royal Family were belittling her husband.

"She just didn't understand that real royals don't care much about houses and material possessions because, having always had them, they take them for granted, said one member of staff who helped out regularly at Nottingham Cottage."

Mr Quinn added: "A rather beautiful house in the grounds of a famous palace hardly seemed to Harry the equivalent to being forced to live in a shed at the end of the garden. But for Meghan things were more complex. She saw Kate and William living just a few yards away in Kensington Palace itself with teams of live-in servants.

"She also undoubtedly felt constrained by protocol. 'Meghan quite rightly hated the fact that when she was in Nottingham Cottage, she had to agree well in advance what time she might leave for an appointment or an event and she had to make sure she didn’t leave at the same time as, or clash in any way with, a more senior royal leaving the palace,' a former Kensington Palace staffer said."