England, 17th June 1969, Princess Irene of Greece takes a bow with her distinguished piano tutor Gina Bachauer on stage at the Royal Festival Hall after Princess Irene made her British debut as a concert pianist [Getty Images]

England, 17th June 1969, Princess Irene of Greece takes a bow with her distinguished piano tutor Gina Bachauer on stage at the Royal Festival Hall after Princess Irene made her British debut as a concert pianist (Photo by Paul Popper/Popperfoto via Getty Images/Getty Images) — see more

England, 17th June 1969, Princess Irene of Greece takes a bow with her distinguished piano tutor Gina Bachauer on stage at the Royal Festival Hall after Princess Irene made her British debut as a concert pianist (Photo by Paul Popper/Popperfoto via Getty Images/Getty Images)