Roberts made a bold choice with her Stella McCartney tuxedo-pants-and-ball-gown ensemble. Equally striking were her ear adornments: A pair of white gold earrings set with pear-shaped and round diamonds from Chopard’s Red Carpet Collection.

Adams was picked by Cartier to debut its new Galaxies de Cartier collection that included this spiky 18k rose gold bracelet set with moonstone, milky quartz and diamonds.

Wearing an all-white Givenchy Haute Couture gown, Moore looked absolutely radiant thanks in no small part to a pair of earrings from Chopard’s Precious Lace Collection with pear-shaped diamonds set in 18k white gold.

The Golden Globe presenter is an angelic vision, pairing her sheer tulle Gucci dress with a pair of drop-dead-gorgeous emerald earrings complemented with cushion-shaped diamonds from Chopard’s Haute Joaillerie Collection.

Close, who won Best Actress Drama Motion Picture for The Wife, looked regal in her Armani Prive, a fact that was accentuated by this Cartier High Jewellery white gold watch dressed up in diamonds.

The Favourite actress wisely chose to accent her dramatic ruffled Celine dress with a simple Cartier choker embellished with onyx, coral and diamonds.

She famously wore heels from a high street label, hidden most of the time under her expensive Calvin Klein by Appointment dress. Her choice of jewellery, however, was suitably haute: A pair of Bulgari High Jewellery diamond earrings that matched the sparkly tassels on her dress.

The A Star Is Born director and actor wowed in a white Gucci tuxedo. For arm candy, he had his supermodel date Irina Shayk as well as an automatic IWC Portugieser Chronograph in pink gold case with a grey slate dial.

The Black Panther star rocked some serious bling on the lapel of his Burberry tux: A vintage Cartier brooch in platinum and white gold set with baguette diamonds.

The Best Actor winner in a Drama Motion Picture (Bohemian Rhapsody) looked dapper in a Givenchy tux accessorised with a Cartier Tank MC watch and double C logo cufflinks.

Homecoming's Best Actor TV Drama nominee James chose Chopard’s L.U.C Regulator in rose gold case to go with his Ralph Lauren Purple Label ensemble, which he also embellished with a pair of diamond-and-onyx cufflinks.