Written by Allyssia Alleyne, CNN

Catherine, Duchess of Cambridge, took a stand for sustainable fashion on Sunday night, re-wearing a familiar Alexander McQueen gown to the 73rd annual British Academy Film Awards (BAFTAs).

Charlize Theron wears a sculpted purple DIor gown Credit: Tolga Akmen/AFP/Getty Images

The Duchess had first worn the elegant floor-length white gown, which is embroidered with golden hibiscus flowers, to a state dinner in Malaysia in 2012.

The outfit choice was in keeping with the BAFTAs' new efforts to prioritize sustainability. In January, the organizing body announced it would be encouraging guests to opt for more environmentally friendly fashion choices — whether bought from sustainably minded brands, rented, or sourced from second-hand retailers — and presented guests with a pamphlet from the London College of Fashion's Centre of Sustainability to help guide their decisions.

Zoe Kravitz

Zoe Kravitz Credit: Tolga Akmen/AFP/Getty Images

In keeping with that spirit, "Joker" star Joaquin Phoenix wore the same bespoke Stella McCartney tuxedo he vowed to wear for the duration of award season (so far, he's worn it to the Golden Globes, the Critics' Choice Awards and the Screen Actor's Guild Awards); and "Little Women" star and Best Actress nominee Saoirse Ronan wore a simple black Gucci gown crafted from discarded satin textiles.

A brief history of the red carpet

But for the most part, guests (or at least their stylists) prioritized glamour, opting for new designs from the usual heavy hitters that didn't boast specific green credentials.

Scarlett Johansson in a pink mermaid dress

Scarlett Johansson in a pink mermaid dress Credit: Tolga AkRead More – Source

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