Sydney's richest socialites attend fashion entrepreneur's wedding and enjoy reception at celebrity hotspot in Coogee amid tar ball drama

The wealthiest families in Sydney gathered at a celebrity hotspot in Coogee on Thursday, amid hundreds of mysterious 'tar balls' washing up on the famous beach, to a witness fashion entrepreneur's nuptials.

Stylist and brand consultant Caroline Tran married her fiancee James Stuz in an elegant beachside ceremony that blended the worlds of old-money aristocracy and modern celebrity at her Mimi's reception.

The luxurious beachside eatery, owned by billionaire pub baron Justin Hemmes, has seen more than its fair share of romantic rendezvous amongst the Harbour City's elite.

The exclusive venue in the Coogee Pavilion has become the preferred spot for celebrities to debut their new relationships.

The establishment has also become known to Sydney paparazzi, who are often seen waiting at the front of the venue.

Caroline hosted her reception in the private dining room, which also recently played host to a visiting Kourtney Kardashian and her children.

The beaming bride and groom were married outdoors overlooking the beach and posed for pictures in the afternoon sunshine with their guests.

Alyce Tran, The Daily Edited founder and the bride's beloved sister, was the only guest to wear anything close to white.

The highly-successful entrepreneur furnished her sister's wedding with custom plates by her brand, In The Roundhouse.

It came after the blushing bride indulged in her 'something blue' with a bridal suite hosted by Tiffany's.

Caroline chose a gorgeous silk and lace off-the-shoulder number for her wedding dress and a breathtaking veil that fanned out around her as she walked down the aisle.

Wedding guests Louise O'Neil, Deobrah Symond O'Neil, and Poppy Tzaneros stunned in black gowns for the Aussie take on a black-tie event in Spring.

A group of flower girls were dressed by La Coqueta Kids, the same designer kids' label that Rebel Wilson used for her own wedding.

The trio, who posed for photos together during the special event, are part of an elite clique of Sydney's heirs and heiresses, and their spouses (who are typically also heirs and heiresses) from the other mega-wealthy dynasty families.

At the centre of its web are the O'Neils.

Deb is the eldest daughter of 'Aussie John' Symond, one of Australia's richest men - with a reported net worth of $780 million.

The bubbly blonde married her prince charming, Ned, the son of wealthy property magnate and yachtie, Denis O'Neil.

'Such a special day celebrating beautiful friends,' she captioned a carousel of photos from the wedding.

Poppy, the owner of Poco Designs, is one of the most sought-after interior designers in the eastern suburbs.

The clique wouldn't be complete without Hamilton Island brand manager Nicky Oatley, whose family also happen to own the $200million slice of Queensland paradise.

The silver trays of Dom Pérignon must have been flowing because Deb's husband Ned was later pictured receiving a kiss and a cuddle from fashion designer Michael Lo Sordo.

'I can't kill the ostrich feathers,' Lo Sordo said he squeezed into a taxi to the venue.

It appears he was also the couple's marriage celebrant.

'Bringing the drama,' Bondi Pilates queens Bernadette Fahey giggled in a video posted to her Instagram Stories.

The Body by Berner founder wore a butter-yellow strapless dress and posed for pictures with gal pal Kristina Macourt and Four Seasons Condoms heir, Michael Porter.

This was a true society wedding in every sense, with the high-profile attendees taking to social media on Friday to share every intimate and lavish detail with their followers.

While their parents might have carefully guarded their privacy, this generation's love of Instagram and ostentatious weddings continues to cast a spotlight on the web of families that make up the Forbes Rich List.

It was a lucky feat, just two days after beaches between Bondi and Botany Bay were closed to the public intermittently due to the mysterious arrival of hundreds of black tar balls .

The 'unusual' spheres were first discovered along Coogee Beach on Tuesday, prompting Randwick City Council to immediately shut the beach while testing was conducted.

Gordons Bay, Clovelly Beach and Maroubra Beach have also been closed to the public since then after the balls also washed up along their shoreline.

UNSW chemist Alex Donald has confirmed the tar balls originated from weathered oil.

'It is still unclear whether they resulted from natural seepage or a crude oil spill,' he said on Friday.