But we were pleased to discover that her gorgeous lemon yellow midi dress wasn't straight off a runway - it was in fact a well-disguised high street buy.
The City starlet donned this £46 frock from Topshop to the couture show, teamed with golden lace-up heels, layered statement necklaces, a clear clutch and skinny tan belt.
Steal Olivia's style by snapping up the very same dress, available to buy now at topshop.com.
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