 | Elijah Wood als Frodo Baggins |
 | Ian McKellen als Gandalf |
 | Viggo Mortensen als Aragorn |
 | Sean Astin als Samwise Gamgee |
 | Sean Bean als Boromir |
 | Billy Boyd als Peregrin 'Pippin' Took |
 | Dominic Monaghan als Meriadoc 'Merry' Brandybuck |
 | Ian Holm als Bilbo Baggins |
 | Christopher Lee als Saruman |
 | Liv Tyler als Arwen |
 | John Rhys-Davies als Gimli |
 | Orlando Bloom als Legolas |
 | Hugo Weaving als Elrond |
 | Cate Blanchett als Galadriel |
 | Brent McIntyre als Witch-King |
 | Sala Baker als Sauron |
 | Andy Serkis als Gollum |
 | Lawrence Makoare als Lurtz |
 | Craig Parker als Haldir |
 | Marton Csokas als Celeborn |
 | Peter McKenzie als Elendil |
 | Mark Ferguson als Gil-Galad |
 | Harry Sinclair als Isildur |
 | Noel Appleby als Everard Proudfoot |
 | Megan Edwards als Mrs. Proudfoot |
 | Sarah McLeod als Rosie Cotton |
 | David Weatherley als Barliman Butterbur |
 | Ian Mune als Bounder |
 | Michael Elsworth als Gondorian Archivist |
 | Cameron Rhodes als Farmer Maggot |
 | Martyn Sanderson als Gate Keeper |
 | Billy Jackson als Cute Hobbit Child |
 | Katie Jackson als Cute Hobbit Child |
 | Alan Howard als The Ring (voice) |
| Victoria Beynon-Cole als Hero Orc / Goblin / Uruk-hai / Ringwraith |
| Paul Bryson als Hero Orc / Goblin / Uruk-hai / Ringwraith |
| Lance Fabian Kemp als Hero Orc / Goblin / Uruk-hai / Ringwraith |
 | Phil Grieve als Hero Orc / Goblin / Uruk-hai / Ringwraith |
 | Lee Hartley als Hero Orc / Goblin / Uruk-hai / Ringwraith |
| Jonathan Jordan als Hero Orc / Goblin / Uruk-hai / Ringwraith |
| Semi Kuresa als Hero Orc / Goblin / Uruk-hai / Ringwraith |
| Sam La Hood als Hero Orc / Goblin / Uruk-hai / Ringwraith |
| Jono Manks als Hero Orc / Goblin / Uruk-hai / Ringwraith |
| Ben Price als Hero Orc / Goblin / Uruk-hai / Ringwraith |
| Chris Streeter als Hero Orc / Goblin / Uruk-hai / Ringwraith |
 | Clinton Ulyatt als Hero Orc / Goblin / Uruk-hai / Ringwraith |
 | Peter Jackson als Albert Dreary / Painting of Bungo Baggins (uncredited) |
 | Chris Ryan als Breelander (uncredited) |
 | Bret McKenzie als Figwit (uncredited) |
| Betty Adams als Hobbit (uncredited) |
 | Timothy Bartlett als Hobbit (uncredited) |
| Bob Blackwell als Hobbit (uncredited) |
| David Houma als Hobbit (uncredited) |
 | Jo Surgison als Hobbit (uncredited) |
| Liz Merton als Hobbit Band Member (uncredited) |
 | Zo Hartley als Kissing Hobbit (uncredited) |
| Norman Cates als Party Hobbit (uncredited) |
| Jeff Kingsford-Brown als Party Hobbit (uncredited) |
| Marta Martí als Village Female Hobbit (uncredited) |
| Riley Brophy als Cute Hobbit Child (uncredited) |
| Phoebe Gittins als Cute Hobbit Child (uncredited) |
| Taea Hartwell als Cute Hobbit Child (uncredited) |
 | Shane Rangi als Witch-King (uncredited) |
 | Jed Brophy als Ringwraith (uncredited) |
 | Paul Shapcott als Burning Ringwraith (uncredited) |
 | Alan Lee als Ring King of Men (uncredited) |
 | Larry Rew als Ring King of Men (uncredited) |
 | Gino Acevedo als Ring Dwarf-Lord (uncredited) |
| Xander Forterie als Ring Dwarf-Lord (uncredited) |
| Richard Maybery als Ring Dwarf-Lord (uncredited) |
 | Sabine Crossen als Rivendell Elf (uncredited) |
| Gareth Jensen als Rivendell Elf (uncredited) |
| Ben Britton als Last Alliance Elf / Rivendell Elf (uncredited) |
| Kester Fordham als Last Alliance Elf / Rivendell Elf (uncredited) |
| Jarl Benzon als Last Alliance Elf (uncredited) |
| Sam Kelly als Last Alliance Elf / Council Elf (uncredited) |
| Matt Appleton als Council Elf (uncredited) |
| Blair Morton als Council Elf (uncredited) |
 | Ray Henwood als Council Man (uncredited) |
| Ralph Johnson als Council Man / Orc (uncredited) |
| Jonathan Harding als Council Elf / Lothlorien Elf (uncredited) |
| Jørn Benzon als Lothlorien Elf (uncredited) |
 | Ben Fransham als Lothlorien Elf / Goblin / Uruk-hai (uncredited) |
 | Tim Kano als Gondorian Citizen (uncredited) |
| Sacha Lee als Arms of Gollum (uncredited) |
 | Thomas Robins als Hand of Gollum (uncredited) |
| Randall William Cook als Cave Troll (uncredited) |
 | Rachel Clentworth als Goblin (uncredited) |
| Lani Jackson als Goblin (uncredited) |
| Sharon Maxwell als Goblin (uncredited) |
| David J. Muzzerall als Goblin (uncredited) |
 | Winham Hammond als Goblin / Orc / Uruk-hai (uncredited) |
 | Mana Hira Davis als Goblin / Orc / Uruk-hai (uncredited) |
| Warren Green als Isengard Orc Blacksmith (uncredited) |
| Stu Johnson als Isengard Orc Blacksmith (uncredited) |
| Peter Lyon als Isengard Orc Blacksmith (uncredited) |
 | Peter Daube als Khai (uncredited) |
 | Samuel E. Shore als Refugee / Orc (uncredited) |
| Rodney Bane als Orc (uncredited) |
| Daniel Andrews als Orc / Uruk-hai (uncredited) |
 | Siaosi Fonua als Orc / Uruk-hai (uncredited) |
 | Ken Stratton als Isengard Orc / Last Alliance Soldier / Morgul Orc / Uruk-hai (uncredited) |
| Lynden Berrymen als Uruk-hai at Amon Hen (uncredited) |
| Ryan Carey als Uruk-hai (uncredited) |
| Tack Daniel als Uruk-hai (uncredited) |
 | Shane Dawson als Uruk-hai (uncredited) |
| Branko Dordevich als Uruk-hai (uncredited) |
| Greg Lane als Uruk-Hai (uncredited) |
 | Tim McLachlan als Uruk-hai (uncredited) |
| Dean Morganty als Uruk-hai (uncredited) |
| Greg Morrison als Uruk-hai (uncredited) |
 | Andrew Munro als Uruk-hai (uncredited) |
 | Grant Roa als Uruk-hai (uncredited) |
 | Vincent Roxburgh als Uruk-hai (uncredited) |
 | Mike Stearne als Uruk-hai (uncredited) |
 | Andrew Stehlin als Uruk-hai (uncredited) |
 | Tim Wong als Uruk-hai (uncredited) |
| Peter Jackson | Director |
| Peter Jackson | Producer |
| Barrie M. Osborne | Producer |
| Bob Weinstein | Executive Producer |
| Harvey Weinstein | Executive Producer |
| Mark Ordesky | Executive Producer |
| Michael Lynne | Executive Producer |
| J.R.R. Tolkien | Novel |
| Peter Jackson | Screenplay |
| Fran Walsh | Screenplay |
| Philippa Boyens | Screenplay |
| Howard Shore | Original Music Composer |
| Andrew Lesnie | Director of Photography |
| Grant Major | Production Design |
| John Gilbert | Editor |
| Joe Bleakley | Art Direction |
| Philip Ivey | Art Direction |
| Rob Outterside | Art Direction |
| Mark Robins | Art Direction |
| Ngila Dickson | Costume Design |
| Richard Taylor | Costume Design |
| Victoria Burrows | Casting |
| John Hubbard | Casting |
| Liz Mullane | Casting |
| Amy Hubbard | Casting |
| Ann Robinson | Casting |
| Guy Williams | 3D Supervisor |
| Christian Rivers | Visual Effects Designer |
| John Mahaffie | Second Unit Director |
| Geoff Murphy | Second Unit Director |
| Malcolm Cromie | Sound Recordist |
| Ken Saville | Sound Recordist |
| Hammond Peek | Sound Recordist |
| Chris Todd | Dialogue Editor |
| Jason Canovas | Dialogue Editor |
| Ethan van der Ryn | Supervising Sound Editor |
| Mike Hopkins | Supervising Sound Editor |
| Michael Semanick | Sound Re-Recording Mixer |
| Gethin Creagh | Sound Re-Recording Mixer |
| Christopher Boyes | Sound Re-Recording Mixer |
| Michael Hedges | Additional Sound Re-Recording Mixer |
| Craig Tomlinson | Sound Effects Editor |
| Tim Nielsen | Sound Effects Editor |
| John McKay | Sound Effects Editor |
| Brent Burge | Sound Effects Editor |
| Pierre Vinet | Still Photographer |
| Dianne Moffatt | Script Supervisor |
| Oksana Sokol | Script Supervisor |
| Pat Robins | Script Supervisor |
| Carolynne Cunningham | First Assistant Director |
| Peter Skarratt | First Assistant Editor |
| Jamie Selkirk | Supervising Editor |
| Nancy Allen | Music Editor |
| Suzana Peric | Music Editor |
| Dan Hennah | Supervising Art Director |
| Sala Baker | Stunts |
| Jules Cook | Assistant Art Director |
| Jim Rygiel | Visual Effects Supervisor |
| Peter Swords King | Makeup Designer |
| Peter Swords King | Hair Designer |
| Hammond Peek | Production Sound Mixer |
| Tim Abbot | Prop Maker |
| Jacqui Allen | Assistant Art Director |
| Ruben Allen | Art Department Production Assistant |
| Judy Alley | Set Dresser |
| Ben Beemsterboer | Prop Maker |
| Kevin Bradshaw | Prop Maker |
| Alan Lee | Set Decoration |
| Alan Lee | Conceptual Design |
| Roxane Gajadhar | Art Department Coordinator |
| Chris Hennah | Art Department Manager |
| Ross McGarva | Assistant Art Director |
| Danielle Osborne | Art Department Production Assistant |
| Brigitte Yorke | Art Department Coordinator |
| Marc Ashton | Second Assistant Director |
| Martin Kwok | Assistant Dialogue Editor |
| Chris Ward | Assistant Sound Editor |
| Katy Wood | Assistant Sound Editor |
| Mary Connolly | Visual Effects Production Assistant |
| Aaron Barclay | Compositor |
| Aaron Cowan | Visual Effects Coordinator |
| Paul Lasaine | Visual Effects Art Director |
| Sarah McLauchlan | Visual Effects Coordinator |
| Margaret Aston | Hairstylist |
| Margaret Aston | Makeup Artist |
| Rick Findlater | Hairstylist |
| Rick Findlater | Makeup Artist |
| José Luis Pérez | Key Hair Stylist |
| José Luis Pérez | Key Makeup Artist |
| John Howe | Conceptual Design |
| David Farmer | Sound Designer |
| Kerryn Flewell-Smith | Makeup Artist |
| Mark Kinaston-Smith | Makeup Artist |
| Bronwyn Knott | Makeup Artist |
| Davina Lamont | Makeup Artist |
| Vivienne MacGillicuddy | Makeup Artist |
| Peter Owen | Makeup Designer |
| Janine Schneider | Makeup Artist |
| Lenore Stewart | Makeup Artist |
| Tera Treanor | Makeup Artist |
| Nancy Hennah | Makeup Artist |
| Noreen Wilkie | Makeup Artist |
| Jeremy Woodhead | Makeup Artist |
| Catherine Maguire | Makeup Artist |
| Emma Moncrieff | Makeup Artist |
| Allie Rutherford | Makeup Artist |
| Tanya Travis | Makeup Artist |
| Linda Wall | Makeup Artist |
| Laurelle Ziento | Makeup Artist |
| Kelly L'Estrange | Visual Effects Producer |
| Charlie McClellan | Visual Effects Producer |
| Eileen Moran | Visual Effects Producer |
| Steen Bech | Visual Effects Supervisor |
| Geoff Dixon | Visual Effects Supervisor |
| Mark Owen Forker | Visual Effects Supervisor |
| Dean Lyon | Visual Effects Supervisor |
| Tim Sanders | Producer |
| Fran Walsh | Producer |
| Robert Shaye | Executive Producer |
| Randall William Cook | Animation Supervisor |
| Mark Stetson | Visual Effects |
| Jamie Beswarick | Sculptor |
| Daniel Falconer | Sculptor |
| Rick Porras | Co-Producer |
| Richard Taylor | Makeup Supervisor |
| Greg Powell | Stunt Coordinator |
| Casey O'Neill | Stunts |
| Jamie Selkirk | Co-Producer |
| Ellen Somers | Associate Producer |
| George Marshall Ruge | Stunt Coordinator |
| Daniel W. Barringer | Stunt Coordinator |
| Steve Ingram | Special Effects Coordinator |
| Peter Mills | Assistant Sound Editor |
| Martin Oswin | Foley Recording Engineer |
| Phil Heywood | Foley Artist |
| Simon Hewitt | Foley Artist |
| Chris Godfrey | Visual Effects Supervisor |
| Michael Lloyd | Visual Effects Supervisor |
