Principal photography for “Titanic” began in September 1996, according to the Democrat & Chronicle. That means Leonardo DiCaprio, born on November 11, 1974, was two months shy of his 22nd birthday when he began shooting the character that propelled him to stardom. When the film came out in December 1997, DiCaprio was 23 years old. Kate Winslet was 20 when filming began, but turned 21 a month later.
While promoting “Titanic 3-D” on iTV’s “Daybreak” in 2012 (via Us Magazine), Winslet confirmed that’s how old they were, using the opportunity to tease her former co-star and friend about his changed looks. “We do look very different, we’re older. Leo’s 37, I’m 36 — we were 21 and 22 when we made that film. You know, he’s fatter now — I’m thinner,” she joked. The young actors were tasked with bringing to life what was set to become the highest-grossing film of all time, according to Variety, and win a record-breaking number of Oscars, according to the Guinness World Records.
To accomplish such extraordinary feat, DiCaprio and Winslet had to become a team. “Kate and I are … so close on this film. We’re like partners,” DiCaprio told E! News at the time. The two famously developed a bond that is still going strong. “Our chemistry and our friendship was so profound. … We were very, very lucky that we did just click and got on so well all of the time,” Winslet said.