Kate Middleton reportedly snubbed one of the royal family's suggestions for her big day.

The Duke and Duchess of Cambridge tied the knot in a lavish royal wedding in 2011. Middleton looked great, but the members of the Firm were reportedly not "particularly down with her forgoing a traditional up-do."

In the documentary "William & Kate: The Journey," reporter Ashley Pearson revealed how the royals felt about Middleton's royal wedding hairstyle. "Royal sources tell me that the royals indicated very strongly to Kate that they would prefer her to wear her hair up for this very special occasion. However, Kate had her heart set on wearing her hair down with long flowing curls, which is her favorite way to wear it, and actually, William's favorite as well," Person said (via Cosmopolitan).

Middleton ended up vaguely compromising with a half-up hairdo. Prior to Prince William and Middleton's wedding, the duchess had a private meeting with the Queen. Pearson claimed that Her Majesty wanted to teach Middleton lessons on how to be a royal wife.

"From the beginning, Kate Middleton had a great deal of support from the Royal Family which was really instructed by the Queen," Pearson said. "[This was] to make sure that she knew as much as she could possibly know and what to do in every situation – bearing in mind, of course, that she didn’t grow up in this world."

For the meeting, Queen Elizabeth II taught Middleton the basics in how to act as a royal in public. The monarch shared the royal etiquette to Prince William's then wife-to-be, such as how to get out of a carriage and bend down to get flowers without exposing herself.

"Things that you would never think you’d have to learn but, of course, a woman in her position would certainly need to know," Pearson added. "There were all kinds of small details [and] little bits of etiquette – how to sit, who to curtsy to, who not to curtsy to, what fork to use and whatever else they felt she needed to know. She was actually given lessons on how to be a royal wife."

Prince William and Kate Middleton
Kate Middleton was told to wear her hair up for her 2011 royal wedding to Prince William, but she didn't comply. Pictured: Middleton and Prince William greet well-wishers from the balcony at Buckingham Palace on April 29, 2011 in London. Getty Images/Christopher Furlong