'Game of Thrones' stars Kit Harington and Rose Leslie are engaged - here's everything to know about their real-life love story

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Kit Harington and Rose Leslie starred on HBO's "Game of Thrones" together.

HBO's "Game of Thrones" may not be known for its happy endings, but so far costars Kit Harington and Rose Leslie are living the sweetest fairy-tale worthy love story.

The couple, who played on-screen couple Jon Snow and Ygritte, are now engaged, according to People.

Though Harington and Leslie have been rumored to be on-again, off-again, truthfully they just seem to be very private people.

Here's the history of their non-fictional love story.