‘Jurassic Park’ Star Sam Neill’s Cause of Death Revealed

The star of “Jurassic Park” Sam Neill died suddenly earlier this week … and now TMZ has learned the cause of his death.

Philippe GrenzNeill’s manager tells TMZ…the actor died of pneumonia…before falling ill, Sam valiantly fought and beat lymphoma with a new treatment called CAR-T therapy.

In addition to running his award-winning winery, Two Paddocks, the Irish-born actor has filmed four back-to-back projects over the past year, all of which we’re told will be released in the coming months.

Like TMZ previously reportedone of his former co-stars said Neill had pneumonia before he died… but now we know that was actually the cause.

As you know… Sam died On Monday in a hospital in Sydney, Australia, his death was described as “sudden and unexpected”.

Grenz told TMZ…a private service for family and friends will be held at his New Zealand farm – but no public service or celebration of life will take place. We’re told the beloved actor never liked having a big deal made about him in life…and that will be honored in his death.

For those wishing to honor Sam’s memory, in lieu of flowers, his family requests that donations be made to one of the causes closest to his heart, including the Dunstan Hospital Foundation, the Snowdome Foundation or a New Zealand charity or fund that supports the sustainability, protection and preservation of New Zealand’s wildlife, bushland and native lands, such as the NZ Nature Fund and Sustainable Tarras.

Sam was 78 years old.