Kate Winslet has said she "wouldn't look" when intimate scenes between her character and Leonardo DiCaprio are played during the premiere of Titanic in 3D.
When asked about how she would feel seeing herself naked on the big screen, the 36-year-old said: "Terrible, wouldn't you?
"I'm not going to look, I'll be in the bar by that point."
Winslet, who was wearing a glistening Jenny Packham gown, walked the red carpet with co-star Billy Zane and director James Cameron at the Royal Albert Hall in Kensington, west London.
The new Titanic release comes 15 years after the original film was a huge hit, pulling in billions at the box office and winning 11 Oscars.
Winslet, who won a Best Actress Oscar in 2009 for The Reader, played sensitive socialite Rose DeWitt Bukater alongside DiCaprio's Jack Dawson in the epic drama.
She added that looking back at her younger self would be "weird".
"It is like being forced to go through a photo album of your former self for three and a half hours solidly.
"It's quite strange but the film is still wonderful and it looks incredible."
She continued: "I haven't seen the whole film in a very long time, I've seen little pieces of it, but it's a whole different me and we look much younger and our acting was different, hopefully not as good as now."
Cameron came to London fresh from the success of his latest venture.
He used a specially designed submarine, called Deepsea Challenger, to dive nearly seven miles below the surface of the Pacific.
He reached the ocean's deepest point on Earth - a place where only two men had gone before - early on Sunday, local time.
The descent took him to the Mariana Trench, about 200 miles south west of the Pacific island of Guam.
Tonight, the director said: "One of the reasons I made Titanic was that I was fascinated by deep sea exploration.
"It was an opportunity to dive in a submarine very deep at that time.
"But the dive I did the other day I went past Titanic depth in the first 40 minutes and I was also only a third of the way down.
"There is a vast unexplored frontier down there and we've only really just scratched the surface."
More than 1,000 people died when the Titanic sank after hitting an iceberg on its maiden voyage in 1912.
The story of the ship, which was on its way from Southampton to New York, has inspired countless books and films and a new mini series made by Downton Abbey writer Julian Fellowes has just begun on ITV.