Casey opted to wear a cute pink and white floral dress to the event, held at London's Savoy Hotel, and matched it with a nude clutch and coordinating heels.
The glamour model's Rare London frock was from new online fashion boutique Inside Mia's Closet and was the perfect choice for a June afternoon!
Casey was among a long list of celebrities at the event, including pregnant Kimberley Walsh, Simon Cowell and Lauren Silverman and CBB winner Jim Davidson.
Ahead of the party, she tweeted: "Off to the @HealthLottery Tea Party at The Savoy this afternoon. Going to be a lovely day x."
Casey hasn't stopped since appearing in CBB at the beginning of the year and she recently spilled the beans on some very exciting news.
While chatting to her at the Reveal Online Fashion Awards, Casey admitted that she has been in talks to star in several British films - and is planning on flying out to Marbella with the TOWIE gang!
Although Casey won't be featuring in the new series of TOWIE, she and good friend Danielle Armstrong see Marbs as the perfect opportunity for a girlie holiday!
Check out Casey and Danielle at our red carpet pics from the Reveal Online Fashion Awards:
Copyright: WENN Daniel Deme