Prince Charles, who recently called Joan Rivers "utterly irreplaceable" after her death is believed to be a close friend of the late comedienne.
Whilst paying his tribute to Rivers, Charles said in a statement that she was an extraordinary woman with an original and untiring spirit, an unstoppable sense of humor and an enormous zest for life and she will be hugely missed, People Magazine reported.
Former chief executive of the Prince's Trust, Sir Tom Shebbeare, revealed that Charles was "a big fan" of Rivers and the American TV host had an enthralling personality and he use to found the late comedienne very funny.