Washington, April 20 -- Olivia Williams, known for her roles in 'The Crown' and 'The Sixth Sense,' has shared her harrowing experience with pancreatic cancer, revealing years of misdiagnoses and dismissals by doctors.

As per Deadline, the actress is now supporting Pancreatic Cancer UK, a charity that aims to raise awareness and fund research for the disease.

Williams was diagnosed with VIPoma, a rare neuroendocrine tumour of the pancreas, after visiting 10 doctors in three countries over four years.

She was initially misdiagnosed with lupus, perimenopause, and other forms of cancer, and was even referred for a psychiatric assessment.

"If someone had f--ing well diagnosed me in the four years I'd been saying I was ill... then one opera...