Jo Carter, 36, was “in tears” over the kindness of two tip workers who managed to retrieve her £3,000 engagement ring.
Property developer Edoardo Mapelli Mozzi, 36, designed the piece in collaboration with the British jewellery designer Shaun Leane.
The then-actress was also forced to remove a fake engagement ring during filming in case onlookers thought the royal had proposed.
"The idea was to take as many photos, in more daring scenarios, until I found the perfect moment to propose."
"I was gesticulating a little too violently when my engagement ring flew off and rolled into a pavement grate."