Not only is Ellie good friends with Eugenie's cousin, Prince Harry, but the ladies have also developed a close friendship over the years. The ladies have been spotted together at a handful of charity events, and most recently, watched the the Brooklyn Nets take on the New York Knicks at Madison Square Garden in NYC. We also wouldn't be surprised if Ellie took the stage for another performance, like she did at the Duke and Duchess of Cambridge's 2011 wedding.