Which actress played the lead role of Rose DeWitt Bukater in the 1997 film 'Titanic'?

Kate Winslet

Kate Winslet was so determined to play Rose that she reportedly sent director James Cameron a rose with a note signed 'From your Rose' to land the part. During filming, she famously refused to wear a wetsuit in the cold water tanks, which actually led to her developing hypothermia to ensure her shivering looked authentic.