A glamorous fashion designer discovered dead on a boat at a yacht club on Tuesday had just celebrated the debut of her sleek lifestyle brand at an upscale resort in the Hamptons.

Martha Nolan-O’Slatarra, aged 33, who founded the fashion label East x East, was found unresponsive aboard a boat moored at the Montauk Yacht Club around midnight.

Good Samaritans attempted life saving measures, but East Hampton Town Police pronounced her dead at the scene. 

Her manner of death remains unclear and will be determined by the Suffolk County Medical Examiner’s Office. 

However, a boater present described the vessel, named Ripple, as a ‘party boat’ and mentioned to the Daily Mail that there were screams everywhere when the woman’s body was found.

Nolan-O’Slatarra’s death comes just weeks after she boasted about the grand opening of her popup shop at Gurney’s Montauk Resort and Seawater Spa.

‘Goals Achieved,’ she wrote on a video shared of the shack housing her bikinis and beach wear shard on TikTok on July 1 as she encouraged the public to come visit.

Many in the wealthy enclave have now been left reeling as questions remain about what may have happened to the Manhattan resident, whom resident described to the New York Post as ‘well-known in the community.

‘She was very friendly, always smiling,’ the local said. ‘There’s going to be a lot of conversation out of this.’

Martha Nolan-O’Slatarra, 33, the founder of fashion label East x East, was found unconscious onboard a boat docked at the Montauk Yacht Club at around midnight

She had recently celebrated the opening of her popup shop at Gurney’s Montauk Resort and Seawater Spa

Indeed, another regular at the Yacht Club claimed Nolan-O’Slatarra’s boyfriend owns the boat – which is registered in Long Beach, New York – and told Daily Mail that whenever she saw the boat owner he would be ‘drunk and always messed up.’

As Nolan-O’Slattara fell unconscious Monday night, she said, the boat owner was seen running outside naked screaming as he tried to get help from other boaters.

‘We come here (to Montauk) every summer and nothing like this ever happens,’ the boater said. ‘The police have been here all day since four in the morning.’

As the investigation continued into the early hours of Wednesday, police officers were seen stopping guests at the Montauk Yacht Club – as the area was being cordoned off.

But many in the upscale enclave continued their day as normal, lounging by the pool or dining at one of the Yacht Club’s restaurants.

They did not seem to have a care in the world, even as police officers and detectives in suits gathered on the dock.

Violent crimes are unusual in the upscale Long Island beach and resort area that is known for its monstrous mansions and high-end dining.  

Influencers and celebrities often flock to the area, especially in the summer months. 

One boater at the scene described the ship, named Ripple, as a ‘party boat’ and told Daily Mail that she heard there was blood everywhere

As the investigation continued into the early hours of Wednesday, police officers were seen stopping guests at the Montauk Yacht Club – as the area was being cordoned off

Violent crimes are unusual in the upscale Long Island beach and resort area that is known for its monstrous mansions and high-end dining. (Pictured: Montauk Yacht Club) 

The Montauk Yacht club offers those beach-goers luxurious accommodations, including spa services, a pool, beach, harbor cruises, biking and yoga.

Rooms at the famed club run for about $1,500 in the summertime and around $865 during other months. 

Celebrity makeup artist Patrick Ta even hosted an event there this past weekend that included a star studded guest list, including influencers Alix Earle and Remi Bader. 

Photos showed the glamourous influencers looking sun-kissed as they enjoyed cocktails and food at the yacht club. 

They were also seen overlooking the breathtaking marina which has now become a crime scene.  

There is no indication that the events hosted at the club this weekend are connected to the discovery on Tuesday morning.