Prince William & Prince Harry Leading Queen Elizabeth's 8 Grandchildren In Vigil

Prince William and Prince Harry will stand vigil together beside their grandmother, Queen Elizabeth's coffin on Saturday. The pair is set to lead the Her Majesty's 8 grandchildren in the somber tradition at the monarch's lying-in-state at Westminster Hall. "The grandchildren, at the King's invitation, are very keen to pay their respects – just as their parents are doing the evening before," a palace source told Access Hollywood. Prince Harry will be allowed to wear his military uniform.