(1) It is interesting to see Princess Ines of Bourbon & Two Sicilies wearing the reddish tiara.
(2) It is sobering to see that then-Princess Elizabeth of York (later Queen Elizabeth II) may be the only person still alive today from that wedding when she was a 5 year old bridesmaid.
(3) I knew the groom was a Spencer in that picture before I scrolled to see whose wedding it was. He definitely had Spencer looks and height. He was John Spencer-Churchill, Duke of Marlborough.