Francesca Packer spared no expense as she celebrated her 26th birthday aboard the exclusive Island day club on Sydney Harbour on Sunday afternoon.And Daily Mail Australia can reveal some of the colourful guests in attendance, who run the gamut from well-heeled social elites all the way to former bikie associates.The most high-profile attendees were, of course, Francesca's own relatives from the Packer publishing and casino-owning dynasty.The who's who of Francesca Packer's (centre) 26th birthday party: Inside the exclusive guest list - including posh relatives Ros and Gretel and ex-bikie associate Mark Judge (right) - as the heiress celebrates on Sydney Harbour. Pictured left: Double Bay hairdresser Jacki MannThe guests were told to dress for a 'Eurotrash / Logomania' theme, and there were plenty of luxury brand names on display as the festivities kicked off.While her publicity-shy uncle James Packer wasn't there, her mother Gretel and grandmother Roslyn were seen arriving dressed to the nines. At the other end of the pecking order, former bikie associate Mark Judge - who has formed an unlikely friendship with Francesca in recent months - was in attendance alongside a woman believed to be his girlfriend.His bikie links aside, Mark is perhaps best known for being at the centre of a bizarre tabloid scandal involving actress Jodi Gordon 11 years ago.All aboard! The guests were told to dress for a 'Eurotrash / Logomania' theme, and there were plenty of luxury brand names on display as the festivities kicked offFamily ties: While Francesca's publicity-shy uncle James Packer wasn't there, her mother Gretel and grandmother Roslyn (pictured) were seen arriving dressed to the ninesIn 2009, Jodi, who at the time was in a relationship with Channel Seven heir Ryan Stokes, was found by police cowering in the home of the suspected Rebels bikie.Officers responded to a call at Mark's Bellevue Hill home after he reported that armed men were in his backyard and trying to scale his balcony.CCTV footage reviewed by police found no sign of the men, only Jodi and Mark hiding in a bedroom.Jodi allegedly told police that cocaine had been consumed that day. Days before the episode, Ryan had called Kings Cross police to report his then-girlfriend missing after a night out.Friends: At the other end of the pecking order, former bikie associate Mark Judge (right) - who has formed an unlikely friendship with Francesca in recent months - was in attendance Past: His bikie links aside, Mark (bottom left) is perhaps best known for being at the centre of a bizarre tabloid scandal involving actress Jodi Gordon 11 years agoFlashy! Birthday girl Francesca posed for a selfie with her friend Bianca Roccisano, who is the owner of Booby Tape All smiles! Also in attendance were Alison Egan (centre), the director and founder of Sparkling White Smile, and Andrew Stenos (right), the founder of Sydney building firm Integriti ProjectsHost with the most: Businessman Julian Tobias, who owns the Hamptons-style floating day club The Island on which the party was held, was believed to be in attendanceSydney's The Island Described as 'Sydney's most exclusive event space', The Island is a floating open-air beach club pontoon with five-star service, a fully licensed bar and VIP banqueting options.In 2011, Adam Abrams and Julian Tobias relaunched the European beach club on Sydney Harbour.Pictured: The Island set up for Francesca's 26th birthday partyAlso in attendance at Francesca's party was businessman Julian Tobias, who owns the Hamptons-style floating day club The Island, on which the party was held.Described as 'Sydney's most exclusive event space', The Island is a beach club pontoon with five-star service, a fully licensed bar and VIP banqueting options.In 2011, Julian and his business partner Adam Abrams relaunched the venue on Sydney Harbour.The vessel was completely decked out for Francesca's celebrations, with large custom signage and smaller personalised touches - all the way down to the food wrappers and napkins.Taking to Instagram as the event was in full swing, Francesca reposted several Instagram Stories from her guests, including hairdressers, stylists, TV hosts, DJs, company founders and CEOs, as well as a host of other well-dressed socialites. Sydney stylist Mars Marsanic, known on social media as Everybody Knows Mars, mingled with the likes of Double Bay hairdresser Jackie Mann. Art guru Justin Miller took the Eurotrash theme one step further and turned up dressed as a Pink Poodle, despite the soaring temperatures.Unfortunately, things didn't exactly go to plan for Francesca when she was arriving to the venue thanks to a rather unfortunate wardrobe malfunction. Euro Trash: Sydney personal stylist Mars Marsanic (left left), who is known on social media as Everybody Knows Mars, mingled with other revellers at the boat partyTakes an army: Francesca posed for a snap with Sydney hair stylist Caitlin Stralow (left)That's bold: Art guru Justin Miller took the Eurotrash theme one step further and turned up dressed as a Pink Poodle, despite the soaring temperatures'One of my all times':  Francesca reposted plenty of selfies on the day, including this one with emcee Alistair BoothEntertainers: Acclaimed DJ and production duo The Stafford Brothers performed at the eventThird outfit! Francesca went all out, sporting at least three separate outfits as the day went onPals: She is pictured here with the founder of Beauty Boosters supplements, Adam BeydounGlamorous: Francesca, who is the niece of businessman James Packer, festooned herself in designer attire for the milestone occasion, sporting a silk Fendi pyjama top worth $2290, sunglasses from the same brand worth $540, and a $5,000 silver handbagAs the birthday girl arrived at Double Bay Wharf en route to the VIP venue, an unruly gust of wind flipped the hem of her mini-skirt.The flimsy material billowed in the air, leaving Francesca's bare derrière momentarily exposed to those standing behind her. Despite the less-than-ideal situation, Francesca maintained her composure as she sashayed towards the luxury venue. A girl's best friend! It was no surprise to see the jewellery-loving brunette adorned in diamonds, wearing a layered necklace and matching banglesTime to celebrate! As the party kicked off, a jolly-looking Francesca changed into a sequinned mini-dress and styled her hair into a long ponytail Francesca, who is the niece of businessman James Packer, festooned herself in designer attire for the milestone occasion, sporting a silk Fendi pyjama top worth $2290, sunglasses from the same brand worth $540, and a $5,000 silver handbag. She also carried a netted Dior tote bag worth $4,656, and a sequinned Chanel tote worth $8,030.It was no surprise to see the jewellery-loving brunette adorned in diamonds, wearing a layered necklace and matching bangles.Francesca was accompanied by a friend who appeared to be acting as her personal bodyguard, although it's understood he was a guest and not hired security. Protection? Francesca was accompanied by a friend (right) who appeared to be acting as her personal bodyguard, although it's understood he was a guest and not hired securityFancy: The Island offers a fully licensed bar and guests are ferried there on a 48-seat water taxi Francesca Packer's guest listGretel Packer, Francesca's motherRoslyn Packer, Francesca's grandmotherMark Judge, former bikie associate -Julian Tobias, the owner of The Island day clubThe Stafford Brothers, DJ and production duoAdam Beydoun, the founder of Beauty Boosters supplementsAlison Egan, the director and founder of Sparkling White SmileBianca Roccisano, the owner of Booby TapeAndrew Stenos, founder of Sydney building company Integriti ProjectsMars Marsanic, a.k.a. Everybody Knows Mars, personal stylistJacki Mann and Caitlin Stralow, Double Bay hairdressersJustin Miller, art guruDaniel Sabouné, filmmaker