Exclusive Sydney party ends with NRL player knocked out

Roosters forward Dylan Napa. Photo / Getty Images.

A host of celebrities and more than 600 guests attended an exclusive Palm Beach charity party on Saturday night celebrating the return of summer.

Celebrity guests included Kyle Sandilands' girlfriend Imogen Anthony, models Krystal Dawson and Amelia Schubert, Australia's Next Top Model contestant Vitoria Triboni.

It was held by Theo Chambers, son of Chambers Cellar founder Steven Chambers, at his beach house and raised money for the Vasculitis Foundation.

Partygoers dressed up in all sorts of costumers from Captain America, to native Indians and sailors.

A neighbour from the Palm Beach mansion said the music stopped at around 10pm, but people appeared to hang around.

'The music stopped at 10pm but the party continued on until the early hours of the next morning. You could hear a commotion with people talking and yelling and all the rest for hours,' she told the publication.

But after the party was claimed to be shut down, an ugly incident allegedly occurred sending three people to Mona Vale Hospital, including Roosters forward Dylan Napa.

Napa, a 33-year-old man and a woman in her twenties were all taken to hospital with injuries but were released shortly afterwards, according to The Daily Telegraph.

However, Mr Chamber said security had cleared his property of partygoers by the time of the incident and they were not related.

'There is no information suggesting that the charity event and [incident] were in any way connected,' he told the publication.