Prince William, Kate and Prince Harry's best moments

The Royal Family is rich in enduring love stories, sibling solidarity and newfound friendships, but there is one bond that reigns supreme. The Duke and Duchess of Cambridge and Prince Harry have become a triple force by taking on numerous engagements as a team and teaming up to launch some incredible charitable initiatives.

TAP TO SEE OUR GALLERY OF MEMORABLE MOMENTSThe trio hit the Harry Potter exhibit at Warner Bros. Studios.

The close friendship they share is undeniable and it’s clear that Kate has forged a strong relationship with her husband’s brother and best man.

The death of Princess Diana in 1997 formed an unbreakable bond between the royal princes and since then the two have relied on each other for strength, guidance and support. And despite getting married and welcoming two beautiful children, Prince William is still a constant in his younger brother’s life. In fact, the siblings even live next door to each other at Kensington Palace.

Kate, William and Harry cheer their hearts out during the 2012 Olympics.

Over the years, Kate has carved out her own place in Prince Harry’s heart, so much so that the 31-year-old called her his sister during a touching speech at the couple’s wedding in 2011.

From launching programs through their joint foundation to tackling engagements in numbers, here are some of Prince William, Kate and Prince Harry’s best and most memorable moments.

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