Amanda Knox is engaged to longtime boyfriend after sci-fi-themed proposal

Amanda Knox, whose legal drama gripped the world after she was accused of murder in Italy, is engaged to her longtime boyfriend. 

Knox and her now fiance, Christopher Robinson, have dated for three years and announced their engagement in a video posted on social media Friday. 

The proposal happened at their home in Seattle, and featured an alien theme. It starts with Knox going outside after she hears weird noises and finding what looks like a meteorite with blue light glowing in the backyard. 

As Knox laughs nervously and asks what's happening, she finds a tablet with an overview of their love story. 

"I had been thinking about this, but it's already happened in the future," Robinson says in the video. "It's happening now. I don't have a ring, but I do have a big rock. Will you stay with me until the last star in the last galaxy burns out and even after that? Amanda Marie Knox, will you marry me?"

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