Oscar winner Kate Winslet and director James Cameron are in London for the red carpet premiere of a new, 3D version of Titanic.
Winslet shot to worldwide fame after starring in the original 1997 film alongside Leonardo DiCaprio.
Director James Cameron said he was "plucked off my expedition ship" for the premiere, following his recent deep ocean descent off Pacific island Guam.
He told the BBC he thought of the epic movie as "a timeless classic".
The 3D conversion would allow fans to "revisit" the box-office blockbuster, he added.
"The big thrill of it isn't just the 3D," he said, "it's bringing it back to the big screen, where it has a lot more emotional impact".
The movie, which took two years to film, saw Winslet play upper class socialite Rose DeWitt Bukater opposite DiCaprio's third class passenger Jack Dawson.
Until the release of Avatar in 2009 - also directed by Cameron - Titanic was the most successful movie ever, with global takings of $1.843bn (£1.14bn).
Avatar went on to make $2.77 billion (£1.76 billion).
Speaking of the 3D conversion, Cameron said: "More than ever, you feel you're right there going through all the jeopardy that Jack and Rose go through."
"The 3D kicks the whole experience up to another level."
He added he would consider 3D versions of his other movies, including the first two Terminator films, if they were considered economically viable.