Prince William, Princess Kate and Prince Harry Wish Great Britain's Olympic Athletes Good Luck in New Video

— -- Prince William, Princess Kate and Prince Harry have recorded a special video message to cheer on Team Great Britain ahead of tomorrow night's opening ceremony of the Rio Olympics.

Prince Harry, who recently hosted his own Invictus Games for injured soldiers and veterans, encouraged the British Olympians, saying, "Each member of Team GB will have a unique journey, but they all share the same aim, to deliver the best performance they possibly can."

Their Royal Highnesses, who were front and center at the 2012 Summer Olympics in London, made an impassioned plea for the athletes to do their best.

William told the competitors, "London 2012 saw this country come alive with a passion for sport. It saw people of all ages, and from all walks of life, join together to support Team GB."

Kate, who is a huge sports fan, tennis player and sailor, told the team, "We are all so excited to see what can be achieved in Rio."

366 British athletes will seek to top the medals record set at the London Olympics.

William, Kate and Harry will not be attending the Olympics in Rio, but will certainty be among Team GB's biggest supporters.

"Let's top 2012," Prince Harry told Team GB. "Bring on the great."