Fitness influencer Kimberley Searle almost suffers a major wardrobe malfunction as she shows off her boob job in a very daring cut-out black gown at Perth races

An Australian social media star turned heads on Saturday as she arrived at Perth's Ascot Racecourse for Derby Day in a daring barely there ensemble.

Fitness influencer Kimberley Searle made sure all eyes were on her as she stepped out braless in a striking $169 black maxi-dress from Runaway The Label at the G.H. Mumm champagne tent.

Her bold outfit featured a plunging halter neckline, daring cut-outs, an open back and a thigh-high split.

The figure-hugging dress showcased Kimberley's toned physique and her bust.

She completed the statement look with a fluffy white handbag, feather-like in texture and topped with a beaded pearl handle.

The influencer added some classy touches to her look with a pearl headband in her hair and chic white strappy heels.

She opted for glamorous yet understated makeup, highlighting her complexion with a sun-kissed glow, defined eyes and a soft, natural lip.

Posing against a floral backdrop, the influencer appeared confident as she showed off the head-turning ensemble from every angle.

Her daring outfit offered a departure from the more traditional race day looks on display.

She shared a gallery of photos of the outfit on social media, captioning it 'A moment for the dress. 

'Make your body the best outfit you will ever wear.'

Kimberley has built an online following through her interest in fitness and social media, where she shares glimpses of her lifestyle with followers.

She is also the face of Melbourne activewear brand Elite-N-Titled, and has thousands of social media followers.