She then appeared in films such as Inventing the Abbotts (1997), Armageddon (1998), Cookie's Fortune and Onegin (both 1999), Dr. T & the Women (2000), and One Night at McCool's (2001). She then played the elf Arwen Undómiel in the Lord of the Rings film trilogy (2001–2003), which became one of the highest-grossing film series in history.