Myer ambassador Elyse Knowles stunned in a bright yellow ensemble by Acler, paired with a hat by Melissa Jackson Millinery.
"100% torrential rain, and a little ray of sunshine," Elyse shared to Instagram ahead of the race.
Lara Bingle - now Worthington - also refused to let the rain put her off a day out at the races.
She turned up to the Melbourne Cup wearing a white ensemble paired with a black beret.
Australian TV host and model Rachael Finch wowed in red for the prestigious occasion.
Rachael wore a dress by Elliatt at Myer and a headpiece by Lady of Leisure Millinery.
Her knee-length ensemble featured thin shoulder straps and the model wore her long brown hair in loose waves.
Despite having just six weeks to go until she gives birth to the couple's first child, Kris Smith's pregnant partner Sarah Boulazeris was out for the big day.
She showed off her baby bump in a pale pink dress, while Dannii Minogue's ex Kris opted for a funky chequered suit - accessorised with a yellow rose.
Megan Gale, meanwhile, was star-spangled in a black and silver gown, accessorised with a custom headpiece by Stephanie Spencer millinery.
Julie Bishop and her partner David Panton and posed at the Bumble Birdcage Marquee.
Julie - former Minister for Foreign Affairs - is known for her astute fashion sense and she wore a bold-patterned dress for the occasion.
She accessorised her ensemble with a black bag and a intricate black headpiece.
Big Brother's Tully Smyth posed outside the Mumm Space Odyssey Marquee wearing a frilly, emerald green dress.
Bachelor star Anna Heinrich looked stunning for the occasion in a muti-coloured dress by By Johnny.
Model and mother Lindy Rama-Ellis - formerly Lindy Klim - wowed in a bright purple hue.
While she posted to Instagram hours earlier suggesting she would wear a red, strappy gown to Cup day, it appeared Lindy may have had a change of heart as she turned up in a different dress - one with sleeves, perhaps to take into account the inclement weather.
Jodi Anasta got into the theme of the Mumm Space Odyssey Marquee as she wore a silver ensemble that appeared as if it had been inspired by the galaxies of outer-space.
Australian model and actress Ellie Gonsalves also opted to embrace the space-age theme as she wore a stunning silver gown.
Radio star Andy Lee and his partner Rebecca Harding posed for photos at the Seppelt Marquee - with Rebecca showing off her slim pins in a taupe mini dress.
