101-year-old Rose DeWitt Bukater tells the story of her life aboard the Titanic, 84 years later. A young Rose boards the ship with her mother and fiancé. Meanwhile, Jack Dawson and Fabrizio De Rossi win third-class tickets aboard the ship. Rose tells the whole story from Titanic's departure through to its death—on its first and last voyage—on April 15, 1912.
| Jack Dawson | Leonardo DiCaprio |
| Rose DeWitt Bukater | Kate Winslet |
| Cal Hockley | Billy Zane |
| Molly Brown | Kathy Bates |
| Ruth DeWitt Bukater | Frances Fisher |
| Old Rose | Gloria Stuart |
| Brock Lovett | Bill Paxton |
| Captain Smith | Bernard Hill |
| Spicer Lovejoy | David Warner |
| Thomas Andrews | Victor Garber |
| Bruce Ismay | Jonathan Hyde |
| Lizzy Calvert | Suzy Amis |
| Lewis Bodine | Lewis Abernathy |
| Bobby Buell | Nicholas Cascone |
| Anatoly Milkailavich | Anatoly M. Sagalevitch |
| Fabrizio | Danny Nucci |
| Tommy Ryan | Jason Barry |
| 1st Officer Murdoch | Ewan Stewart |
| Fifth Officer Lowe | Ioan Gruffudd |
| 2nd Officer Lightoller | Jonny Phillips |
| Chief Officer Wilde | Mark Lindsay Chapman |
| Quartermaster Rowe | Richard Graham |
| Quartermaster Hichens | Paul Brightwell |
| Master at Arms | Ron Donachie |
| John Jacob Astor | Eric Braeden |
| Madeleine Astor | Charlotte Chatton |
| Col. Archibald Gracie | Bernard Fox |
| Benjamin Guggenheim | Michael Ensign |
| Madame Aubert | Fannie Brett |
| Irish Mommy | Jenette Goldstein |
| Helga Dahl | Camilla Overbye Roos |
| 3rd Class Woman | Linda Kerns |
| Trudy Bolt | Amy Gaipa |
| Sir Duff Gordon | Martin Jarvis |
| Lady Duff Gordon | Rosalind Ayres |
| Countess of Rothes | Rochelle Rose |
| Wallace Hartley | Jonathan Evans-Jones |
| Irish Man | Brian Walsh |
| Bert Cartmell | Rocky Taylor |
| Cora Cartmell | Alexandrea Owens |
| 4th Officer Boxhall | Simon Crane |
| 6th Officer Moody | Edward Fletcher |
| Frederick Fleet | Scott G. Anderson |
| Lookout Lee | Martin East |
| Harold Bride | Craig Kelly |
| Jack Phillips | Gregory Cooke |
| Chief Baker Joughin | Liam Tuohy |
| Father Byles | James Lancaster |
| Ida Strauss | Elsa Raven |
| Isidor Straus | Lew Palter |
| Irish Little Boy | Reece P. Thompson III |
| Irish Little Girl | Laramie Landis |
| Cal's Crying Girl | Amber Waddell |
| Cal's Crying Girl | Alison Waddell |
| Yaley | Mark Rafael Truitt |
| 1st Class Husband | John Walcutt |
| Chief Engineer Bell | Terry Forrestal |
| Leading Stoker Barrett | Derek Lea |
| Carpenter John Hutchinson | Richard Ashton |
| Elevator Operator | Sean Nepita |
| Scotland Road Steward | Brendan Connolly |
| Crewman | David Cronnelly |
| 1st Class Waiter | Garth Wilton |
| Promenade Deck Steward | Martin Laing |
| Steward #1 | Richard Fox |
| Steward #2 | Nick Meaney |
| Steward #3 | Kevin Owers |
| Steward #4 | Mark Capri |
| Hold Steward #1 | Marc Cass |
| Hold Steward #2 | Paul Herbert |
| 1st Class Steward | Emmett James |
| Stairwell Steward | Chris Byrne |
| Steward Barnes | Oliver Page |
| Titanic Porter | James Garrett |
| Olaf Dahl | Erik Holland |
| Bjorn Gunderson | Jari Kinnunen |
| Olaus Gunderson | Anders Falk |
| Slovakian Father | Martin Hub |
| Slovakian 3 Year Old Boy | Seth Adkins |
| Praying Man | Barry Dennen |
| Man in Water | Vern Urich |
| Mother at Stern | Rebecca Klingler |
| Woman | Tricia O'Neil |
| Woman in Water | Kathleen S. Dunn |
| Syrian Man | Romeo Francis |
| Syrian Woman | Mandana Marino |
| Chinese Man | Van Ling |
| Olaf | Bjørn Olsen |
| Sven | Dan Pettersson |
| Pubkeeper | Shay Duffin |
| Carpathia Steward | Greg Ellis |
| News Reporter | Diana Morgan |
| Dancer | Kris Andersson |
| Dancer | Bobbie Bates |
| Dancer | Aaron James Cash |
| Dancer | Anne Fletcher |
| Dancer | Edmond Alan Forsyth |
| Dancer | Andie Hicks |
| Dancer | Scott Hislop |
| Dancer | Stan Mazin |
| Dancer | Lisa Ratzin |
| Dancer | Julene Renee |
| First Class Woman (uncredited) | Alexandra Boyd |
| Steerage Dancer (uncredited) | James Cameron |
| Musician / Baker (uncredited) | Mike Butters |
| Third Officer Pitman (uncredited) | Kevin De La Noy |
| Deckhand (uncredited) | Tony Kenny |
| Charles Hendrickson (uncredited) | Sean Lawlor |
| Frederick Spedden (uncredited) | Don Lynch |
| Rescue Boat Crewman (uncredited) | Johnny Martin |
| First Class Passenger (uncredited) | Meghan McLeod |
| Engine Room Crewman (uncredited) | Steven Quale |
| Drowning Man (uncredited) | R. Gern Trowbridge |
| Mary Marvin (uncredited) | Olivia Rosewood |
| Ohio Man (uncredited) | John Slade |
| Titanic Gym Instructor Thomas McCawley (uncredited) | Brian McDermott |
