Tantrums, demands and cruel name-calling: What Palace staff allegedly saw behind closed doors.

A new royal tell-all is soon to be hitting shelves, and it's spilling all kinds of regal tea.

Set for release on February 25, Yes Ma'am: The Secret Life of Royal Servants by Tom Quinn is pulling back the curtain on what it's really like to work for the British royal family.

From tantrums to family feuds, this book will dish out behind-the-scenes drama that makes The Crown look tame. Here are the biggest revelations so far…

Watch: How is the royal family like 'MAFS'? Post continues after video.

Prince William and King Charles' tantrums.

Prince William, future King of England, apparently has a short fuse.

According to royal insiders in the book, both he and King Charles are known for their tempers, with William expecting his daily routine to be carried out with military precision — from perfectly pressed suits to a bath at the exact same time each day.

If things aren't just right? A tantrum might follow, the book claims.

"[King Charles and William] both get irritated very quickly," one former member of staff told author Quinn, as per an excerpt published in the The Times UK.

"They are very picky. It comes naturally to them."

The royals' demands.

But it's not just William and Charles — some of the other royals can reportedly be quite, um, demanding too.

Prince Andrew reportedly had staff reassigned for trivial reasons, like a mole on one colleague's face and the material of someone's tie.

Prince Edward once allegedly criticised his driver simply for looking in the rearview mirror too often.

And Prince Harry, despite generally being well-liked, was apparently prone to occasional outbursts over minor inconveniences.

"I remember once in his private apartments, I'd muddled something — some of his papers on the desk or something. He was immediately angry, and it was out of proportion to the problem, or at least I thought it was," one aide told Quinn.

Kate Middleton is the family's MVP.

Kate Middleton not only plays a key role in shaping the family dynamic, but is also said to be the one who calms William down. One former staffer even claimed she sometimes treats William like a "fourth child".

"I don't know where William would be without Kate — she hasn't had everything done for her throughout her life, so she calms him down when he gets a bit fractious," an insider said.

And while their public image is all poise and polish, behind closed doors, they do argue, one source told the author — though they reportedly keep it civil, throwing cushions instead of vases. Progress?

The book also reveals that she had to teach William basic parenting skills, including how to give piggyback rides to their children.

William reportedly said, very quietly: "My father never gave me a piggyback."

Meghan Markle: a polarising figure.

The book paints a picture of Meghan as someone who clashed with the palace from the start, mainly due to her warm and informal approach. Her habit of hugging and cheek-kissing reportedly made some royals deeply uncomfortable.

Staff even gossiped that she was "flirting" with Prince William — a completely unfounded rumour that only deepened tensions.

Her hands-on approach didn't sit well with the traditionalist staff, some of whom dubbed her "Mystic Meg" due to her "woke" and "new age-y" beliefs. Aides apparently grew concerned that she had transformed Harry into a "tree-hugging leftie".

Younger staff, however, saw her as a trailblazer challenging outdated traditions.

Harry and William's nicknames for Camilla.

Turns out, William and Harry weren't exactly thrilled about Camilla Parker-Bowles joining the family.

As their father's relationship with her became more serious, the brothers allegedly dubbed her "Lady Macbeth," "The Witch of the West", and even "Cruella de Vil." Yikes!

Despite this, Camilla reportedly never wanted to be queen, at one point telling Charles they could just leave royal life behind.

Spoiler alert: they didn't.

"You're doing it for me, darling," Charles allegedly told her.

The pressure on royal staff.

The book highlights just how demanding life inside the palace can be, making it clear that even though the royals live in luxury, their staff certainly don't have it easy.

King Charles once reportedly told a staffer that having help was "the only benefit of being Prince of Wales [which Charles was at the time] 24 hours a day and seven days a week".

With those high expectations and impossible standards, it's no wonder working for the royal family isn't exactly seen as a dream job. Staff members constantly have to walk a fine line between tradition and the ever-changing whims of their royal bosses.

Final thoughts.

At this point, we probably all suspected that royal life wasn't as glamorous as it looks from the outside. But early info from Yes Ma'am gives us a peek at just how chaotic and demanding it can be behind palace doors — and there's more to come when the book hits shelves on February 25.

Who needs The Crown when the real-life royal soap opera keeps delivering?!

Feature Image: Getty.