Grace Hayden channels Marilyn Monroe in a plunging gown as she reveals her racewear rule for showing skin

She's the glamorous sports presenter and influencer known for her bombshell looks.

And Grace Hayden channelled one of Hollywood's most iconic bombshells, Marilyn Monroe, this week as she attended the Sydney Everest Carnival Styling Suite in a plunging gown. 

The Australian socialite and style influencer turned heads in a custom sparkling creation by Oglia-Loro Couture at the event, hosted by The Langham. The shimmering dress and low neckline giving her look a distinctly old-Hollywood feel.

Grace completed the glamorous ensemble with pops of pink, pairing the glittering gown with pink shoes and a matching headband.

Speaking to the Daily Mail as she got ready, Grace said she loves 'living on the edge' when it comes to racewear. 

'It's something that you can really create your own sort of special outfit that you couldn't wear anywhere else,' she said.

'There's no limitations.'

However, she does stick to a few rules when it comes to showing skin trackside.

'If you're going to show off your top half, you should wear something with length. If you're showing your bottom half, you should be a little more covered up,' she explained.

'I do like that you can be a little bit more conservative with race day looks, and stick to the traditional themes, because where can you really do that in everyday life?'

As for footwear, Grace admitted she is a devotee of the pointed-toe heel.

'There's something about it that makes your legs look really long, so you'll always see me in a point toe shoe whenever I can,' she said.

But after committing to a pair of heels for the day, Grace has one secret trick to ensure she can still make it through the event in comfort - packing a pair of compact ballet flats. 

The flats can be tucked into a handbag and slipped on later in the day when the heels become too much, particularly if she's planning to hit the dance floor.

Grace also discussed her raceday hair and makeup preferences, revealing she loves to experiment with boundary-pushing looks. 

'You can really be yourself and express maybe something you wouldn't do when you're just doing your everyday,' she enthused. 

Elsewhere, Grace revealed the beauty regimen she swears by to maintain her glowing complexion, citing Australian skincare brand Rationale's three-step routine as part of her regular regimen. 

She also has a secret weapon she turns to before an important event - an overnight mask.

'I am so obsessed with that mask, it's ridiculous,' she said. 

'I have the pink and the yellow [masks]. So I'll just sleep in that the night before I have something that I'm [doing] the next day and my skin is glowing,' she explained.

Grace also regularly books Rationale facials and occasionally undergoes skin needling.

And while complimentary beauty treatments are common among celebrities and influencers, Grace was quick to stress that she pays for her own facials.

'I pay for all of my facials. I really love the experience, it's such a genuine thing,' she said.

For Grace, one of the biggest benefits of sticking with the same skincare system is having a professional who understands exactly what her skin needs and can adjust her routine accordingly. 

'You just do a consult with a Rationale professional and you stick with them the whole time,' she said.

'She knows your skin and she goes, "Okay, you're maybe a little drier than you normally are at the moment because you've been travelling a lot", so she'll be like, "Okay, take this and this and this and switch this up."' 

Joining Grace at The Langham suite were Real Housewives of Sydney star Krissy Marsh and model Grayson Te Moana. 

Krissy stunned in a plunging black gown by Oglia-Loro Couture, paired with a fascinator by Embellish Atelier and diamond jewellery. 

Grayson, whose profile has risen thanks in part to his relationship with influencer Tammy Hembrow, looked sharp in a black suit by The Tailors Lounge.