Timothée Chalamet has been taking a leaf out of Margot Robbie's red carpet playbook by drawing sartorial inspiration from his latest project.

Just as Robbie took her fashion cues from Barbie while playing the lead in the summer's mega blockbuster, Chalamet has been working sweet details into his red carpet looks as he promotes his new film Wonka, an origin story of the iconic and mischievous chocolatier.

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Having already attended the Wonka premiere in Tokyo wearing a custom pale lavender latex two-piece by Prada, Chalamet upped the ante for the London premiere in his latest look, working with famed French jewellery house Cartier on a custom, one-of-a-kind necklace.

Always one for a unique and boundary-pushing outfits, Chalamet walked the red carpet at the event, held at London's Royal Festival Hall, wearing a cranberry-hued velvet two-piece suit by Tom Ford.

The blazer featured a contrasting satin trim and wide lapels, and he wore it fastened over his bare torso.

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He paired this with a sparkling multicoloured necklace by Cartier, which Chalamet collaborated on. According to British Vogue, the design "was fitted precisely to the contours of his throat in order to sit directly against the skin, allowing all 964 of its emeralds, rubellites, pink tourmalines and blue opals to shine".

The star is a brand ambassador for the design house, and has regularly added signature pieces to his red carpet looks. According to Vogue, he spent hours looking through the Cartier archives for inspiration before meeting Marie-Laure Cérède, creative director of jewellery and watchmaking, in Paris.

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"It seems like there was a really expressive period in the '60s and ’70s when Cartier creations were quite colourful, and really playful, even. The house has such success with their staples… my one curiosity was what something joyful and playful and youthful would look like under the umbrella of a Cartier creation", he told the publication.