So, what exactly did Prince Harry whisper to William at the 2011 royal wedding?

Well, we might not actually know for sure, but there is still tons of speculation surrounding the mysterious message Prince Harry whispered to his brother William at the altar back in 2011.

From the kiss to the dress, many significant moments had the world talking at Prince William's wedding to Kate Middleton seven years ago. But when Prince Harry looked over his shoulder to catch a glimpse of Kate walking down the aisle, he then turned to the groom and whispered some words followed by a laugh, right before the cameras cut to Kate's mom. 

According to a 2011 CBS News report, Tina Lannin, a born deaf professional forensic lip reader deciphered the exchange as "right, here she is now," while, other reports suggest Harry was just cracking a joke to prevent Willaims' nerves. 

Either way, the bromance moment was unforgettable and while we patiently await Prince Harry's wedding on Saturday, May 19 to Meghan Markle, we will undoubtedly be keeping our eyes open for more royal wedding whispers.

Stay tuned.

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William and Kate's Royal Wedding
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William and Kate's Royal Wedding

Kate Middleton waves back to an excited crowd as she enters the church. This was the first moment the world caught a glimpse at the stunning Sarah Burton for Alexander McQueen gown.

Photo: Getty Images

When Pippa Middleton stepped out behind her sister Kate, the world took notice of her 'perfectly shaped backside'. Blogs, Facebook Pages and Twitter accounts were set up in its honor!

Photo: Getty Images

Kate looked just lovely as her father walked her down the aisle.

Photo: Getty Images

The Duchess's dress had an impressive, yet manageable, train, which Pippa tended to like a pro.

Photo: Getty Images

The happy couple could breathe a sigh of relief as they left Westminster Abbey -- it was now time for celebration.

Photo: Getty Images

Kate is simply gleaming following the ceremony while she's being taken with her new husband to the palace.

Photo: Getty Images

Um, hands down the best dressed of the day. How adorable are these kiddos?!

Photo: WireImage/Getty Images

Queen Elizabeth II following the Royal Wedding is perfect in light yellow!

Photo: Getty Images

Prince Harry is no stranger to these types of high profile events, but he seemed to be really enjoying himself.

Photo: Getty Images

Kate's parents were impeccably dressed, with the Mother of the Bride simply glowing in pale blue.

Photo: AFP/Getty Images

Princess Beatrice of York and Princess Eugenie of York exit Westminster Abbey after the Royal Wedding showing off their intricate and detailed hats (which garnered plenty of attention).

Photo: Getty Images

Victoria Beckham arrives to attend the Royal Wedding wearing a navy dress with a matching small pill box hat.

Photo: Getty Images

Tara Palmer-Tomkinson arrives to attend the Royal Wedding wearing an intricate royal blue hat which matched her blue dress.

Photo: Getty Images

The first royal kiss occurred on the balcony of the palace, but the real moment occurred right below when the little flower girl pressed her hands against her ears -- clearly, she was not amused.

Photo: Getty Images

Kate's second dress -- for the evening festivities -- was just as stunning. We loved the sparkling belt!

Photo: AFP/Getty Images

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