The man was arrested on suspicion of murder after Louella was found dead in Woodland around 1am on Monday morning.
The victim has been identified as Louella Michie, the daughter of a British actor John Michie.
She looked odd and didn't look very happy."After announcing a search for the Miss Michie, police confirmed that her body was later found in the wooded area at the edge of the festival's site".
Detective Chief Inspector Sarah Derbyshire, of Dorset Police, said: "Detectives are working tirelessly to investigate the full circumstances surrounding this tragic death".
Further examinations, including a toxicology report, will take place over the coming weeks in order to establish whether there are any substances in Ms Michie's system or other suspicious circumstances.
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The Dorset police have released a 28 year old man connected to the death of Louella Michie at Bestival in the United Kingdom this last weekend.
"They said in a statement their "hearts are broken by the horrific tragedy" and Ms Michie "(appears) to have taken an illegal substance".
He said: "We do not believe there to have been any malice intended in [their] weekend at Bestival".
Louella died a day before her 26th birthday. "The family would like to thank everyone for their heartfelt tributes and messages". We hope the victim's friends and family's will find peace in this hard time.
This year's Bestival took place from September 7 to 10 at Lulworth Estate in Dorset.