She's the niece of Princess Diana, and a Lady in her own right, but when it comes to turning heads on the party circuit, Kitty Spencer is truly the queen. The 28-year-old It Brit stole the show at both of her cousins' major royal weddings (Will's in 2011 and Harry's just last year) and has increasingly become a staple on the London social scene and beyond. But despite all the room for error, the titled fashion darling (who has modeled for Dolce & Gabbana and is an official brand ambassador for BVLGARI) has seemingly never had a misstep on a step-and-repeat. A truly impressive feat, indeed.

If you're looking to brush up on your soiree-ready style skills, a quick flip through Lady Spencer's look book provides all the lessons you need to be the ultimate best dressed guest. On her behalf, you're welcome.

[Photos via @kitty.spencer]