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Queen Elizabeth II, Kate Middleton, Catherine, Duchess of Cambridge

Anthony Devlin - WPA Pool/Getty Images

Even Kate Middleton has her quirks!

In a special documentary about Queen Elizabeth II that aired Sunday night in the U.K., the Duchess of Cambridge revealed what the royal family teases her about ever since she's become an official royal herself.

"She has been very generous and not, sort of, been forceful at all in any of her views," said Kate in the documentary titled Our Queen at 90. "I feel she's been there as a gentle guidance really for me. Everyone teases me in the family that I spend far too long chatting so I think I have still got to learn a little bit more and pick up a few more tips."

Kate and Prince William tied the knot in April 2011, so their fifth wedding anniversary is rapidly approaching. Having spent nearly half a decade with the royals, we're sure she's gotten then hang of it by now! Kate also gave some insight into the Queen as a great grandmother to Prince George and Princess Charlotte.

"George, who's only two and a half, calls her 'Gan-Gan,'" she explained. "She always leaves a little gift or something in their room when we go and stay. That just shows, I think, her love for her family."

When Kate and Williams welcomed Charlotte last spring, the Queen was one of the first people to meet the couple's little girl. "It's very special having a little girl," Kate said. "I feel very, very lucky that George got a little sister. The queen was really thrilled that [Charlotte] was a little girl, and I think as soon as we came back here to Kensington she was one of our first visitors."

This was Kate's first televised interview since her engagement to William, and even though she admitted that her family teases her about her loquacious manner, it appeared that the Queen's tips have gone a long way because she was flawless—as usual.