It's been 15 years since Titanic made its record-breaking debut in theaters, but the flick's leading lady, Kate Winslet, is looking more ageless than ever.

The actress, 36, worked a black silk crepe Jenny Packham gown with Swarovski crystal cap sleeves and waist detail to celebrate the Titanic 3D premiere in London Tuesday.

PHOTOS: Kate Winslet's breathtaking red carpet looks

She accessorized with sparkling jewelry and wore her hair in a low, side-parted chignon.

PHOTOS: What the stars wore at 2012's Oscars

We can't help but look back at Winslet's look from 1998, when she stepped out in an emerald Alexander McQueen for Givenchy gown with gold embroidered detail and a sprawling train at the 70st Annual Academy Awards. While Winslet received a nomination for Best Actress, the film itself boasted fourteen of its own nods with eleven wins including Best Picture and Best Director.

Get more Us! Follow us on Twitter, Friend us on Facebook, Subscribe to Us Weekly