Lily Allen in Sheer Dress at Hunger Games Premiere

Lily Allen turned heads at the London premiere of "The Hunger Games On Stage" on Wednesday night, stepping out in a sheer black knit dress that highlighted her ongoing style evolution following her recent separation from actor David Harbour.

The British singer, 40, attended the event at the Troubadour Canary Wharf Theatre, wearing a 1999 John Galliano-era Dior gown with a high neckline, long sleeves, and intricate perforations that revealed a black thong underneath. She forwent a bra, completing the ensemble with platform black Louboutin heels, gold rings, and a simple updo featuring her signature mussed bangs. Allen's makeup was minimal, with glowy skin, soft blush, and a nude lip, creating a look described by observers as both elegant and bold.

The appearance comes amid Allen's promotional cycle for her latest album, "West End Girl," released last month. The record, which has received widespread acclaim, chronicles the end of her four-year marriage to Harbour, the "Stranger Things" star, through raw lyrics and catchy melodies. Tracks such as "Madeline" and "Tennis" appear to reference an alleged affair, with Allen confronting a woman named Madeline in the former song, asking...