Julian Fellowes's latest TV project will air after the festive Downton Abbey special on December 25. Viewers will also be able to see the two-minute clip in advance online on ITV Player from December 23.
ITV1's Titanic promises to be a mixture of action, mystery and romance, which was inspired by the hundreds of untold stories from the passengers onboard the tragically doomed 1912 voyage.
Linus Roache, Celia Imrie, Toby Jones, Geraldine Somerville, Sophie Winkleman and Timothy West lead the cast.
The large production, which is helmed by production designer Rob Harris (Generation Kill, Hornblower), includes a 2-tier set, housing a 60m promenade deck, 50m boat deck, 4 working lifeboats, 2 collapsible lifeboats, the ship's bridge and pursers' offices, stairways, 75m of interior corridors and over a dozen separate interior rooms - from boiler rooms to dining rooms, third-class bunkrooms to first-class suites.
Titanic is directed by Jon Jones (Northanger Abbey) and produced by Nigel Stafford-Clark (Bleak House) and Chris Thompson (Love Actually).
The miniseries will air in April 2012 to mark the landmark 100th anniversary of the ship's sinking. It will be shown on ABC in the US.