Rumors of a possible reunion between Prince William and his former girlfriend, Kate Middleton have been circulating over the past few weeks. The two have reportedly been spotted on several low-key dates, despite trying hide from the paparazzi. But, like most stories, the news was simply a rumor and there were no hard facts (photos, videos etc.) supporting the idea of the two reuniting. The biggest factor which will confirm that two are indeed together is whether or not Kate will accompany Prince William to the memorial concert he and little brother Prince Harry are holding on Sunday for their mother, Princess Diana.

Prince William and Prince Harry have been working hard to put together a phenomenal concert in commemoration of their mother, who would have turned 46 on Sunday. This year also marks the 10 year anniversary of Diana's passing. According to a statement released by Lee Rolotz, executive producer of VH1's concert broadcast “This (concert) focuses on a person as opposed to a cause. This is a celebration. It’s a tribute, a birthday party, as the princes would put it, for Diana, who was one of the greatest pop culture icons of the 20th century.”

According to People Magazine, Kate is expected to be at the concert, although we're not quite sure if she will be attending with the Prince. And while no reports have definitely confirmed a reunion between the two, a source told People.com "the spark is still there". Maybe we'll see some fireworks between the two this weekend.