As an Actress 

The Romantics (2010)
10A/10B (2009)
The Incredible Hulk (2008) Betty Ross
Smother (2007) Claire
The Strangers (2007) Kristen
Reign Over Me (2007) Angela
Lonesome Jim (2006) Anika
Jersey Girl (2004) Maya
The Lord of the Rings: The Return of the King (2003) Arwen
The Lord of the Rings: The Two Towers (2002) Arwen
The Lord of the Rings: The Fellowship of the Ring (2001) Arwen
One Night At Mccool’s (2001) Jewel
Dr. T And The Women (2000) Marilyn
Cookie’s Fortune (1999) Emma Duvall
Onegin (1999) Tatyana Larin
Plunkett & Macleane (1999) Lady Rebecca Gibson
Armageddon (1998) Grace Stamper
Franky Goes to Hollywood (1998)  
Inventing the Abbotts (1997) Pamela Abbott
U-Turn (1997) Girl in Bus Station
Heavy (1996) Callie
Stealing Beauty (1996) Lucy Harmon
That Thing You Do! (1996) Faye Dolan
Empire Records (1995) Corey
Silent Fall (1994) Sylvie Warden

As Herself

“The 76th Annual Academy Awards” (TV) (2004)
“The Making of ‘The Lord of the Rings’” (TV) (2002)
“Making the Movie: The Lord of the Rings” (TV) (2002)
“A Passage to Middle-earth: Making of ‘Lord of the Rings’” (TV) (2001)
“Quest for the Ring” (TV) (2001)
“National Geographic: Beyond the Movie – The Lord of the Rings” (TV) (2001)
“The 71st Annual Academy Awards” (TV) (1999)
“Franky Goes to Hollywood” (1999)
“Aerosmith: Big Ones You Can Look at” (1994)

Archieve Footage

Premio Donostia a Matt Dillon (2006) (TV) (uncredited)
This Film Is Not Yet Rated (2006)
“DNZ: The Real Middle Earth” (TV) (2004)
The Lord of the Rings: The Third Age (2004) (VG)
“Celebrities Uncensored” – Episode #2.6 (2004) TV Episode
The Lord of the Rings: The Return of the King (2003) (VG)
The Lord of the Rings: The Two Towers (2002) (VG)

Guest appearances on TV

The Making of Incredible (2008) (V) …. Herself
Scream Awards 2008 (2008) (TV) …. Herself
“Entertainment Tonight” …. Herself (1 episode, 2008)
… aka “E.T.” (USA: informal title)
… aka “ET Weekend” (Australia: weekend title)
… aka “Entertainment This Week” (weekend title)
… aka “This Week in Entertainment” (USA: weekend title)
    – Episode dated 13 June 2008 (2008) TV episode …. Herself
“Live with Regis and Kathie Lee” …. Herself (3 episodes, 2004-2008)
… aka “Live with Regis & Kelly” (USA: new title)
… aka “Live with Regis” (USA: new title)
    – Episode dated 13 June 2008 (2008) TV episode …. Herself
    – Episode dated 23 March 2007 (2007) TV episode …. Herself
    – Episode dated 1 April 2004 (2004) TV episode …. Herself
“HBO First Look” …. Herself (2 episodes, 1996-2008)
    – The Incredible Hulk (2008) TV episode …. Herself
    – The Making of ‘That Thing You Do’ (1996) TV episode …. Herself
“The Tonight Show with Jay Leno” …. Herself (2 episodes, 2004-2008)
    – Episode dated 3 June 2008 (2008) TV episode …. Herself
    – Episode dated 2 March 2004 (2004) TV episode …. Herself
2008 MTV Movie Awards (2008) (TV) …. Herself
“Late Show with David Letterman” …. Herself / … (7 episodes, 1996-2008)
… aka “Late Show Backstage” (USA: title for episodes with guest hosts)
… aka “Letterman” (Australia)
… aka “The Late Show” (USA: informal short title)
    – Episode #15.123 (2008) TV episode …. Herself – Guest
    – Episode dated 15 December 2003 (2003) TV episode …. Herself
    – Episode dated 20 December 2002 (2002) TV episode …. Herself
    – Episode dated 13 December 2001 (2001) TV episode …. Herself
    – Episode dated 23 April 2001 (2001) TV episode …. Herself
      (2 more)
“E! True Hollywood Story” …. Herself (2 episodes, 2003-2007)
    – Steven and Liv Tyler (2007) TV episode …. Herself
    – Rock Star Daughters (2003) TV episode …. Herself
Happy Birthday Elton! From Madison Square Garden, New York (2007) (TV) …. Herself
… aka Elton 60: Live at Madison Square Garden (Australia)
“Corazón de…” …. Herself (1 episode, 2006)
    – Episode dated 14 September 2006 (2006) TV episode …. Herself
The Greatest: The 40 Hottest Rock Star Girlfriends… and Wives (2005) (TV) …. Herself
Du kommst nicht vorbei – Fans im Bann des Ringes (2005) (V) …. Herself
Ringers: Lord of the Fans (2005) …. Herself
“Good Day Live” …. Herself (1 episode, 2004)
    – Episode dated 5 April 2004 (2004) TV episode …. Herself
“Late Night with Conan O’Brien” …. Herself (2 episodes, 1999-2004)
… aka “Late Night with Conan O’Brien” (Australia)
    – Episode dated 9 March 2004 (2004) TV episode …. Herself
    – Episode dated 15 April 1999 (1999) TV episode …. Herself
“Total Request Live” …. Herself (3 episodes, 2001-2004)
… aka “TRL Weekend” (USA: informal alternative title)
… aka “TRL” (USA: promotional abbreviation)
… aka “Total Request with Carson Daly” (USA: alternative title)
    – Episode dated 8 March 2004 (2004) TV episode …. Herself
    – Episode dated 16 December 2003 (2003) TV episode …. Herself
    – Episode dated 14 December 2001 (2001) TV episode …. Herself
The 76th Annual Academy Awards (2004) (TV) …. Herself – Presenter: Best Song nominees “Into the West”, “The Scarlet Tide”, “You Will Be My Ain’ True Love”
“The Oprah Winfrey Show” …. Herself (1 episode, 2004)
… aka “Oprah” (USA: short title)
    – Episode dated 27 February 2004 (2004) TV episode …. Herself
“4Pop” …. Herself (2 episodes, 2003)
    – Kuninkaan paluu – tarun päätös (2003) TV episode …. Herself
    – Taru lehdistön herrasta (2003) TV episode …. Herself
“Tinseltown TV” …. Herself (1 episode, 2003)
    – Episode dated 20 December 2003 (2003) TV episode …. Herself
“Frids film” …. Herself (1 episode, 2003)
    – Episode dated 18 December 2003 (2003) TV episode …. Herself
“Filmland” …. Herself (1 episode, 2003)
    – Filmland Special – Ringenes Herre: Kongen vender tilbage (2003) TV episode …. Herself
Lighting Up Fifth (2003) (TV) …. Herself
From Book to Script: Finding the Story (2003) (V) …. Herself
Making the Movie (2002) (TV) …. Herself
… aka Making the Movie: The Lord of the Rings (USA)
The Making of ‘The Lord of the Rings’ (2002) (V) …. Herself
“Troldspejlet” …. Herself (1 episode, 2001)
… aka “Magic Mirror” (International: English title: literal title)
    – Troldspejlet special: Ringenes herre – Eventyret om ringen (2001) TV episode (also archive footage) …. Herself
“Nyhetsmorgon” …. Herself (2 episodes, 1998-2001)
    – Sagan om Ringen äventyrets Början (2001) TV episode …. Herself
    – Filmen ‘Armageddon’ (1998) TV episode …. Herself
A Passage to Middle-earth: Making of ‘Lord of the Rings’ (2001) (TV) …. Herself
Quest for the Ring (2001) (TV) …. Herself
“Live Lunch” …. Herself – Interviewee (1 episode, 2001)
    – Episode dated 27 April 2001 (2001) TV episode …. Herself – Interviewee
“The Rosie O’Donnell Show” …. Herself (3 episodes, 1997-2001)
    – Episode dated 26 April 2001 (2001) TV episode …. Herself
    – Episode dated 15 April 1999 (1999) TV episode …. Herself
    – Episode dated 7 April 1997 (1997) TV episode …. Herself
The Making of ‘Dr. T and the Women’ (2001) (V) …. Herself
National Geographic: Beyond the Movie – The Lord of the Rings (2001) (TV) …. Herself
The 71st Annual Academy Awards (1999) (TV) (uncredited) …. Herself – Presenter: song “I Don’t Want To Miss A Thing”
Franky Goes to Hollywood (1998) …. Herself
“Showbiz Today” …. Herself (1 episode, 1997)
    – Episode dated 1 April 1997 (1997) TV episode …. Herself
Ballando con Bertolucci (1996) (TV) …. Herself
“The Word” …. Herself (1 episode, 1994)
    – Episode #5.10 (1994) TV episode …. Herself
Aerosmith: Big Ones You Can Look at (1994) (V) …. Teenage Girl (video ‘Crazy’)