Before marrying Prince William in 2011, Kate Middleton was given secret princess lessons by someone who knows her royalty by heart, Her Majesty the Queen, the Mirror reports.

Life in the royal household comes with a vast list of protocols, rules, and best practices that the queen apparently took under her wing leading up to Kate's wedding, according to the 2017 Amazon Prime documentary Kate Middleton. The Queen's Decision," Kate took private lessons in "How to be a Royal Wife," met with the Queen, and Her Majesty, among other things, helped Kate decide on her official royal title, according to "Working Class to Windsor: How to be a Royal Wife. Their Decision," Catherine, Duchess of Cambridge.

"From the beginning, Kate Middleton had great support from the royal family, which was really directed by the Queen," journalist Ashley Pearson said in the documentary.

"Of course, we have to keep in mind that she didn't grow up in this world."

One of the most important tips from the Queen's Princess Lessons, Pearson says, is "how to stay humble."

"There were things like learning how to get out of a carriage without exposing your modesty, or learning how to bend over to get flowers from a young girl without exposing your modesty. It's not something you would expect to have to learn, but of course a woman in her position would need to know."

Also, "how to sit, how to bow, who not to bow to, how to use a fork, and anything else she might need to know," Pearson said. She was actually given lessons on how to be a royal wife."

According to royal author Robert Lacey's book, The Battle of the Brothers, Camilla also imparted wisdom to Kate on how to "hold on to the prince." Camilla confided to Kate her secret to clinging to the busy prince: "Keep your timetable, well, basically your whole life, in line with the prince."