The model opted for a fuss-free yet chic look while attending the premiere of new flick Plastic, which stars former Hollyoaks actress Emma Rigby.
Casey ditched her usual glamorous frocks for a sophisticated black jumpsuit by Rare London complete with wide-leg trousers and a high neckline.
Her one-piece did boast a hint of va-va-voom thanks to sheer lace panels placed on either side of her waist.
Casey kept her jewellery simple with large gold hoops and a bangle, completing her ensemble with black strappy heels.
And the starlet totally won us over with her choice of nail colour, rocking tomato red with a hint of orange on both her fingers and toes.
Other attendees at the event included TOWIE's Jasmin Walia - who stepped out with Ex On The Beach star Ross Worswick - and EastEnders' Jacqueline Jossa.
Casey posed on the red carpet with her pal and TOWIE star Danielle Armstrong, while Danielle's on/off boyfriend James Lock arrived separately with co-star Dan Osborne.
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