It looks like there's more to Kate Middleton behind the scenes than we know. Apparently, there's a new report that suggests Prince William's wife has been acting like an "out of control diva" and that it is getting worse by the day.

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According to Life & Style's print edition this week (via Gossip Cop), things are going from bad to worse between the Duchess and Queen Elizabeth in Buckingham Palace. Apparently, Middleton is refusing to abide by the rules as she is expecting to be treated like a celebrity more than a member of the royal family.

In fact, one source even said that the Queen is livid with the Duchess for spending $5,000 on a helicopter ride from London to Norfolk when she herself only spent $70 for the same trip on a train.

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The tipster said, "The Queen is royally ticked that Kate has been spending money like an out-of-control diva. She thinks the extravagance makes the royal family look bad."

What's more, the insider said, "It's just the latest example of Kate's spendthrift ways. In contrast, for Queen Elizabeth, the cheaper, the better. But Kate couldn't be more different, and it's causing more and more friction."

So far, Buckingham Palace has not made any official comments although one source told Gossip Cop that the report is nothing more than "rubbish."

Keep up with Enstars for all the latest news on Kate Middleton and all of your favorite British royal celebrities right here.