She never let go, Jack!

It's been a little over 18 years since Leonardo DiCaprio and Kate Winslet first stole (and then broke) our hearts in Titanic. And while Rose and Jack didn't get the happy ending we so desperately wanted for them, Leo and Kate have stayed close friends in real life.

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Click through the gallery to see 12 photos documenting their friendship through the years, and try not to get too misty-eyed!