Margot Robbie wears a $1.5 million necklace to the 2015 Oscars in Hollywood

Australian actress Margot Robbie attended the 87th Annual Academy Awards held in Hollywood,and wore a Saint Laurent gown.

The black gown featured sheer sleeves and a plunging draped neckline and hid most of the star's famous curves.

'The Wolf of Wall Street' actress's highlight of the attire was her Van Cleep & Arpels 'Zip Antique' necklace.

The $1.5 million necklace features rows of diamonds and a sapphire tassel set in 18k gold.

The necklace was first designed for the Duchess of Windsor in the 1930s and took 800 hours to create,

A sleek bob hairdo and matte red lips completed Margot's look for the evening.

Margot Robbie: 2015 Oscars