Amanda Knox is engaged to his old lover, Christopher Robinson.

The criminal justice advocate who was sensationally and wrongly convicted of the 2007 murder of his roommate in Italy, announced the news Friday.

Joy, 31 years old, revealed Robinson's mysterious and alien-themed proposal – and his emotional acceptance – on Instagram and with edited YouTube videos.

The nerdy proposal, filmed by poet and writer Robinson, shows that he has decorated the yard with frightening lights with fake meteorite smoke that contains a special tablet – when Knox reads the tablet and the "ET" soundtrack is playing in the background.

"I don't have a ring, but I have a big stone. Will you stay with me until the last star in the last galaxy burns. And then even after that," Robinson said. "Amanda Marie Knox, will you marry me?"

"Yes, yes, I will," said Knox, who was so unsuspecting that he was wearing "Harry Potter" pajamas.

The couple then hugged.

"This is really cool," Knox said at rest as they kissed.

Robinson said in a post-production note that the proposal for "madness" was one year in its manufacture. He also explained why there were no rings.

"For the record, Amanda doesn't wear a ring," he wrote.

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Knox, at the age of 20, spent four years in an Italian prison after being convicted twice for a brutal murder in 2007 from his roommate at the British University Meredith Kercher in Perugia, Italy, where they both studied.

The highest Italian court finally released him in 2015 and Knox returned to his hometown in Seattle, Wash. To rebuild his life.

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