Henley 's first acting job was playing Lucy Pevensie in the 2005 film The Lion , the Witch and the Wardrobe , based on the C.S. Lewis novel The Lion , the Witch and the Wardrobe . Henley has won the Phoenix Film Critics Society Award for Best Performance by a Youth Female in a Lead or Supporting Role and the Young Artist Award for Best Performance in a Feature Film â '' Young Actress Age Ten or Younger in 2006 . She is known for her portrayal of Lucy Pevensie in The Chronicles of Narnia film series , for which she won the Phoenix Film Critics Society Award for Best Performance by a Youth Female in a Lead or Supporting Role in The Lion , the Witch and the Wardrobe in 2005 .