Prince Andrew was allegedly rude to Kate Middleton, leaving Prince William "infuriated."

Sources say Andrew is jealous of Kate's popularity and "prominence."

There's speculation that "When William comes to the throne, Andrew will be dust."

Prince William is said to be the driving force behind getting Prince Andrew to give up his titles and leave the Royal Lodge. But apparently William's distaste for his disgraced uncle goes beyond Prince Andrew's friendship with convicted sex offender Jeffrey Epstein. William was also offended by "disparaging remarks" Andrew made about Kate Middleton.

"The feud between Prince William and Prince Andrew started primarily due to Andrew’s jealousy and resulting disparaging remarks regarding Kate Middleton," royal expert Hilary Fordwich tells Fox News .

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