Lúthien, also known as Tinúviel, was the immortal princess of Doriath, wife of Beren Erchamion, and most beautiful of all the Children of Ilúvatar to ever live.
Her love of the mortal man Beren, for whom she was prepared to risk everything, including her life, was legendary and lamented forever in song and story. She and Beren braved Morgoth's horrors, eventually winning a Silmaril from his crown and the approval of their marriage by King Thingol.
Though their actions later resulted in both their deaths, their deeds won them the pity of the Vala Mandos and a second life in Middle-earth.
Her romance with Beren was one of the great stories of the Elder Days that were told for many ages after she lived, and it was said her bloodline will never perish.