Maybe the sun was getting to their heads! Racegoers don't hold back as they take to the track for another day of high (alcohol content) spirits in Melbourne

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Crowds who flocked to 2015 Cox Plate on Saturday were graced with sunny skies and glamorous guests dazzling the trackside.

Models, beauty queens and high-profile Australians lit up the Moonee Valley Racecourse, six kilometres north of Melbourne, and all-white ensembles appeared to be the order of the day. 

But some of the high-spirited crowd opted for more interesting outfits - with the weird and wonderful ranging from storm troopers to men dressed as giant genatalia.

The 2040-metre race is Australia's leading weight for age event and broadly looked upon as the No.2 event on the spring racing calendar after the Melbourne Cup.

Sydney mare Winx and jockey Hugh Bowman claimed victory on the day, slamming the track record and blitzing the field to win the substantial $3 million prize.

Racegoers enjoy a refreshing drink in the sun at the 2015 Cox Plate event in Melbourne

The high-energy event got the better of some punters, such as this woman who appeared to shed tears by a flowerbed

This pair of suavely suited men took a break from the excitement and lay down in the middle of a crowd

In typical race fashion, bizarre costumes made an appearance on the day, such as this man dressed as a stormtrooper

Or there was this man who chose to haul around a plastic doll as his guest for the day

Nobody could steal the shine from this man, who coupled his multicoloured suit with a rude hat

Trackside, former Miss Universe contestant Rachel Finch led the front in the style stakes in a white-on-white lace dress and headpiece.

Other high profile stars enjoying a day at the races included former international cricket Legend Shane Warne and actor Axel Whitehead.

And while there was plenty of high fashion on display, novelty costumes also made an appearance, with one man honouring the forthcoming 'Star Wars: The Force Awakens' film by dressing as a storm trooper.

And then there was the punter who decided to wear an interesting flesh-coloured, bizarrely-shaped hat and the one who was dressed in a yellow onesie carrying a rather adult plastic doll.

Sydney mare Winx and jockey Hugh Bowman claimed victory and the substantial $3 million prize

Hugh Bowman poses with the trophy after claiming first place in his impressive performance 

With warm weather and high-spirits across the course, throngs of racegoers let their hair down at the event

Spirits were running high across the Moonee Valley Racecourse in Victoria

The 2040-metre race is Australia's regarded as the No.2 event on the spring racing calendar after the Melbourne Cup

Big win? An jubilent man takes the higher ground to celebrate at the event

The crowd balanced the warm weather with cold beverages

With warm weather and high-spirits across the course, many racegoers let their hair down with some cold beverages in the sun.

One pair of suavely-suited men took a break from the excitement and lay down in the middle of a crowd, while another woman was spotted appearing to shed tears beside a bed of flowers.

Some women were captured carrying their heels barefoot after the massive day of walking around the racecourse took its toll.

The biggest racing event of the year, the 2015 Melbourne Cup, is expected to draw a crowd of 100,000 plus on Tuesday, November 3. 

Former Miss Universe contestant Rachel Finch poses for photos in the mounting yard

Finch (left) and Richmond AFL player Jack Riewoldt pose together at the Moonee Valley racecourse

International cricket legend Shane Warne was among a slew of high-profile guests at the event

Jessie Habermann, the fiancee of Carlton footballer Marc Murphy, poses at trackside