The actress demonstrates how strappy sandals, vintage denim, and a band T-shirt create the perfect accessible It-girl look for autumn.
Sienna Miller may have finally cracked the code on what defines an It girl. The secret lies in balancing versatility with consistency—someone who can move seamlessly from a runway Erdem gown to casual denim without ever looking out of place.
Miller proved this theory during a recent appearance on The Tonight Show Starring Jimmy Fallon in New York City. While promoting her new HBO series *War*, she stepped out in a deliberately understated ensemble: a vintage Lou Reed graphic T-shirt tucked into vintage Levi's 501 jeans, completed with strappy sandals. The result was an early-fall look that appeared entirely unforced yet instantly memorable.
The key to Miller's approach is accessibility. Her Levi's 501s retail for $110 and are available directly from the brand, though achieving her worn-in patina requires time. Pre-loved alternatives can be found on eBay or Etsy for those seeking immediate character. While her exact Lou Reed tee may prove difficult to locate, any band T-shirt serves the same purpose—retailers like Urban Outfitters stock ample options. The footwear offers similar flexibility, with heeled or flat strappy sandals both completing the formula.
This democratic approach to dressing has defined Miller's career. A genuine It girl cannot exist solely in rarefied fashion circles; relatability matters equally. Her Tonight Show appearance demonstrated that high style need not demand high prices or exclusive pieces. Sometimes, as Miller showed, less truly is more.