Evangeline Lilly (Kate from Lost) plays the elf Tauriel, a character who will be in the second film and the third film, but that does not appear in the book. 

Adaptation of the classic JRR Tolkien’s The Hobbit, which will be divided into three long acclimatised in Middle-earth 60 years before The Lord of the Rings, Peter Jackson and his crew turned in successful trilogy which won the Oscar ® Best Picture for the Lord of the Rings: the Return of the King (2003).