But Billie Piper got it terribly wrong on day five of Glorious Goodwood today.
She appeared to have taken a leaf out of the late actress Judy Garland's book by wearing thick black socks with wedges.
Garland wore white socks with the famous red slippers when she played Dorothy in the Wizard of Oz in 1939.
The former Doctor Who star, 28, paired the ensemble with a black clutch and pale yellow nailpolish.
Her hair looked as though it hadn't been brushed and she opted not to wear a hat, unlike most of the other raceday-goers.