Canadian Shawn Wright was looking for an out-of-this-world marriage proposal.
So, he attached the engagement ring to a balloon rig and sent it 33km above the earth to the edge of space, while filming the whole journey.
Wright, of Calgary, Alberta, and now-fiancee Maylynn Stephenson have been together for six years and have known each other for 20 years.
"I thought, how could I make this special? I can't just hand it to her. I thought for a split second that it would be cool to send it into space. Kind of enchanting the ring for her," he told US cable channel HLN.
"I wanted to be able to capture the sun rising behind the ring while it reached the stratosphere."
Wright built a specialised craft to carry the ring safely high above the Earth, and deliver it back to a point near its Canadian starting place.
The ring was strapped to a wooden kitchen spatula, which was then tied to a high-altitude weather balloon.
Wright also equipped the craft with a radio transmitter and GPS, and a Go-Pro to capture the view.
After launch, the ring journeyed for four hours before landing 300km away from where it began.
"It reached 110,000 feet (33km) when the balloon burst," Wright told HLN.
"It expanded five times its size after that and fell for a bit before the parachute opened and it came back down on a farmer's field 300km away. I was able to track her ring with a GPS and an app on my phone, as well as I had a radio transmitter to follow it live."
Wright retrieved the ring from the edge of a pond in Taber, Alta, and showed the video to his fiancee.
He had asked her to marry him during a trip to Barcelona, Spain, a year earlier and had used a prototype ring until he could save up enough money to buy the real thing.
After his girlfriend saw the video, Wright said, "her mind was blown".
He uploaded the video to YouTube with the following caption: "This is my way of showing you how much you mean to me. I have been working on this project in secret, I hope you think it is as out of this world as you are. I love you! Ps... I owe you a Kitchen Spatula."
Stephenson was delighted by the proposal, according to The Huffington Post Alberta, and said yes.
The couple will tie the knot next year in Bali.