 | Elijah Wood als Frodo Baggins |
 | Ian McKellen als Gandalf |
 | Liv Tyler als Arwen |
 | Viggo Mortensen als Aragorn |
 | Sean Astin als Sam |
 | Cate Blanchett als Galadriel |
 | John Rhys-Davies als Gimli / Treebeard (voice) |
 | Bernard Hill als Théoden |
 | Christopher Lee als Saruman (Extended Edition) |
 | Billy Boyd als Pippin |
 | Dominic Monaghan als Merry |
 | Orlando Bloom als Legolas |
 | Hugo Weaving als Elrond |
 | Miranda Otto als Éowyn |
 | David Wenham als Faramir |
 | Brad Dourif als Wormtongue (Extended Edition) |
 | Karl Urban als Éomer |
 | John Noble als Denethor |
 | Andy Serkis als Gollum / Sméagol |
 | Ian Holm als Bilbo Baggins |
 | Sean Bean als Boromir |
 | Lawrence Makoare als Witchking / Gothmog |
 | Marton Csokas als Celeborn |
 | Paul Norell als King of the Dead |
 | Alan Howard als Voice of the Ring (voice) |
 | Noel Appleby als Everard Proudfoot |
 | Ali Astin als Elanor Gamgee |
 | David Aston als Gondorian Soldier 3 |
 | John Bach als Madril |
 | Sadwyn Brophy als Eldarion |
 | Alistair Browning als Damrod |
 | Richard Edge als Gondorian Soldier 1 |
 | Jason Fitch als Uruk 2 |
 | Phil Grieve als Orc commander (Extended Edition) |
 | Bruce Hopkins als Gamling |
 | Ian Hughes als Irolas |
 | Bret McKenzie als Elf Escort |
 | Sarah McLeod als Rosie Cotton |
 | Maisy McLeod-Riera als Baby Gamgee |
 | Bruce Phillips als Grimbold |
 | Shane Rangi als Harad Leader 2 |
 | Todd Rippon als Harad Leader 1 |
 | Thomas Robins als Déagol |
 | Harry Sinclair als Isildur |
 | Bruce Spence als Black Lieutenant (Extended Edition) |
 | Peter Tait als Shagrat |
 | Joel Tobeck als Orc Lieutenant 1 |
 | Stephen Ure als Gorbag |
 | Sala Baker als Featured Orc |
 | Robert Pollock als Featured Orc |
 | Ross Duncan als Featured Orc |
 | Pete Smith als Featured Orc |
 | Jed Brophy als Featured Orc |
| Lee Hartley als Featured Orc |
 | Billy Jackson als Featured Child |
 | Katie Jackson als Featured Child |
| Jane Abbott als Coronation Elf (uncredited) |
 | Gino Acevedo als Corsair of Umbar (uncredited) |
| Aidan Bell als Orc (uncredited) |
| Jarl Benzon als Coronation Elf (uncredited) |
| Jørn Benzon als Rivendell Elf (uncredited) |
 | Emma Deakin als Diamond of Long Cleave (uncredited) |
 | Michael Elsworth als Círdan the Shipwright (uncredited) |
| Clint Elvy als Haradrim Warrior (uncredited) |
 | Zo Hartley als Orc Helper (uncredited) |
 | Peter Jackson als Corsair Bosun (uncredited) |
 | Sandro Kopp als Coronation Elf (uncredited) |
 | Andrew Lesnie als Corsair of Umbar (uncredited) |
 | Joseph Mika-Hunt als Orc (uncredited) |
 | Henry Mortensen als Pelennor Orc (uncredited) |
 | Craig Parker als Gothmog / Orc Lieutenant 1 (voice) (uncredited) |
 | Rick Porras als Corsair of Umbar / Beacon Guard (uncredited) |
 | Christian Rivers als Corsair of Umbar / Beacon Guard (uncredited) |
 | Michael Semanick als Drinking Rohan Soldier (uncredited) |
 | Howard Shore als Drinking Rohan Soldier (uncredited) |
 | John Stephenson als Witchking (voice) (uncredited) |
 | Richard Taylor als Corsair of Umbar (uncredited) |
 | Royd Tolkien als Gondorian Ranger (uncredited) |
| Barrie M. Osborne | Producer |
| Howard Shore | Original Music Composer |
| Christopher Boyes | Sound Re-Recording Mixer |
| Peter Jackson | Screenplay |
| Peter Jackson | Director |
| Peter Jackson | Producer |
| Bob Weinstein | Executive Producer |
| Harvey Weinstein | Executive Producer |
| Mark Ordesky | Executive Producer |
| Michael Lynne | Executive Producer |
| J.R.R. Tolkien | Novel |
| Fran Walsh | Screenplay |
| Fran Walsh | Producer |
| Philippa Boyens | Screenplay |
| Andrew Lesnie | Director of Photography |
| Grant Major | Production Design |
| Joe Bleakley | Art Direction |
| Rob Outterside | Art Direction |
| Mark Robins | Art Direction |
| Alan Lee | Set Decoration |
| Alan Lee | Conceptual Design |
| John Howe | Conceptual Design |
| Ngila Dickson | Costume Design |
| Richard Taylor | Costume Design |
| Victoria Burrows | Casting |
| John Hubbard | Casting |
| Liz Mullane | Casting |
| Sala Baker | Stunts |
| Dan Hennah | Set Decoration |
| Dan Hennah | Supervising Art Director |
| Jamie Selkirk | Editor |
| Brent Burge | Sound Effects Editor |
| David Farmer | Sound Designer |
| Robert Shaye | Executive Producer |
| Jules Cook | Assistant Art Director |
| Jeremy Woodhead | Makeup Artist |
| Peter Swords King | Makeup & Hair |
| Rick Findlater | Makeup Artist |
| Ann Robinson | Casting |
| Margaret Aston | Makeup Artist |
| Noreen Wilkie | Makeup Artist |
| Janine Schneider | Makeup Artist |
| Beau Borders | Sound Effects Editor |
| Paul Lasaine | Visual Effects Art Director |
| Amy Hubbard | Casting |
| Steve Dubin | Visual Effects Producer |
| Charlie McClellan | Visual Effects Producer |
| Lora Hirschberg | Additional Sound Re-Recording Mixer |
| Ivana Primorac | Makeup Artist |
| Dean Lyon | Visual Effects Supervisor |
| Addison Teague | Sound Effects Editor |
| Ethan van der Ryn | Supervising Sound Editor |
| Michael Semanick | Sound Re-Recording Mixer |
| James Whitlam | Visual Effects Producer |
| Tim Nielsen | Sound Effects Editor |
| Alex Funke | Visual Effects Director |
| Guy Williams | 3D Supervisor |
| Mike Hopkins | Supervising Sound Editor |
| Dave Whitehead | Sound Effects Editor |
| Michael Hedges | Sound Re-Recording Mixer |
| Joe Letteri | Visual Effects Supervisor |
| Christian Rivers | Visual Effects Designer |
| Hayden Collow | Sound Effects Editor |
| Gary Summers | Additional Sound Re-Recording Mixer |
| Jim Rygiel | Visual Effects Supervisor |
| Sean Button | Stunts |
| Eileen Moran | Visual Effects Producer |
| Randall William Cook | Animation Director |
| Nancy Hennah | Makeup Artist |
| Catherine Maguire | Makeup Artist |
| Rick Porras | Co-Producer |
| Angela Mooar | Makeup Artist |
| Gail Wilson | Makeup Artist |
| Davina Lamont | Makeup Artist |
| John P. Nugent | Visual Effects Supervisor |
| Dean Wright | Visual Effects Producer |
| Craig Tomlinson | Sound Effects Editor |
| Jacqui Allen | Assistant Art Director |
| Jeremy Bennett | Visual Effects Art Director |
| Hammond Peek | Production Sound Mixer |
| Vivienne MacGillicuddy | Makeup Artist |
| Chetan Deshmukh | Visual Effects Supervisor |
| Daniel Falconer | Sculptor |
| Kerryn Flewell-Smith | Makeup Artist |
| Steve Hopgood | Makeup Artist |
| Emma Moncrieff | Makeup Artist |
| Allie Rutherford | Makeup Artist |
| Lenore Stewart | Makeup Artist |
| Tera Treanor | Makeup Artist |
| Laurelle Ziento | Makeup Artist |
| Robyn Isaacs | Visual Effects Producer |
| Jamie Beswarick | Sculptor |
| Graham Binding | Animation |
| Bryan Ku | 3D Director |
