Chinese diver He Zi will be coming home from the Rio Olympics with a silver medal, and a diamond engagement ring.

The 25-year-old had just received her medal at the presentation for the women's three-metre springboard event when she was the recipient of another impressive, and entirely unexpected, piece of bling on Sunday night, local time.

As He paraded around the pool deck, her long-time boyfriend and fellow Chinese diver, Qin Kai, suddenly appeared and, clutching a small red jewellery box in a glass case, sank down on one knee in front of her.

The crowd at the Maria Lenk Aquatics Centre went wild as they realised what was happening, and He wiped away tears in an adorable moment that was broadcast live around the world.