The 25-year-old budding actress caught our eye in a print spandex catsuit which she'd teamed with a black adidas hoody, white high-tops and her trademark navy beanie.
The catsuit looked so amazing that we had to ask her where it was from. Cressida's answer? Asos.
That's right, she's is a high street gal too.
Cressida also told MyDaily she is a big Wilderness fan but hadn't quite packed right this year because she was freezing cold and on the hunt for a jumper.
We flagged up Secret Emporium (the ultimate pop-up shop for standout festival wares) and she said she'd check it out.
Bang on festival trend and game for a selfie, Cressida is officially our new BFF.
LOVE CRESSIDA'S STYLE? She can definitely do classy, sophisticated wares but she's most at ease in something laid back and super casual.
Take a look through this gallery to see more looks from the coolest society girl on the scene.