As someone who's been writing about Kate Middleton and her style for the better part of a decade, I'm excited to begin using her new title: The Princess of Wales. As you already know, the moniker was last used by her beloved late mother-in-law, Princess Diana, so it certainly comes with large shoes to fill but I'm quite certain that she will rise to the occasion.

Fittingly, one of her first events as Princess of Wales was a visit to Swansea, Wales, on September 27. Middleton wore LK Bennett's Spencer Red Recycled Wool Blend Snaffle-Detail Coat ($1080) with full-length, wide-leg, slouchy trousers—a persistent trend this year that I personally guarantee will last well into 2023. Scroll down to see her new outfit and shop for similar pieces.

On Kate Middleton: LK Bennett Spencer Red Recycled Wool Blend Snaffle-Detail Coat ($1080); Grace Han bag; Spells of Love earrings; Russell & Bromley heels

Middleton has mastered the art of the wide-leg trouser.

Middleton's exact coat is pricey but oh-so-luxurious.

Next: The Easy 2-Piece Outfit I Wear Every September and October.