Well, this is awkward...
If you're a die-hard Lord of the Rings fan you probably already knew this, but for some people this is new information. Arwen and Aragorn are actually related, and in a way they are first cousins. Sort of.
So here's how it works: Arwen and her family are actually half-elves, which means they can choose if they want to be mortal or immortal. Pretty neat.
Arwen's father, Elrond, once had a brother who decided to become mortal. His name was Elros, and he is an ancestor of Aragorn. Which means Arwen and Aragorn are actually first-cousins, just 62 times removed. This information certainly gives a new meaning to this clip where they affectionately kiss each other.
If you'd like to read more LOTR fun-facts, head on over to this article.