Luthien and Arwen

[Eol]

THis could place either here in the movie board, but I felt like placing it in here. I noticed something interesting the other day when I was overhearing a conversation about some actor and their reaction to the character they were portraying. She mentioned that she thought it was deep that this person gave up their mortality to marry a guy. This happens to be Arwen the actress was talking about. Now wait one moment... Arwen is mortal. The next thing that comes up is the mentioning of Luthien in her description in Book one, fellowship of the ring at the coucil of riverdell. Luthien gave up her immortality to be with Beren. Yet Arwen is her descendent. Someone got their book infor mixed up or did someone play around with stuff and mush the two characers together?