Actor Sam Neill, best known for his role in the Jurassic Park films, has died at 78, his family said. The veteran actor’s passing was described as sudden and unexpected; no official cause of death has been released. Family members said Neill was believed to be cancer-free at the time of his death in Sydney, Australia.
Neill had been publicly battling angioimmunoblastic T‑cell lymphoma (AITL), a rare and aggressive form of peripheral T‑cell lymphoma, for about four years. He first disclosed the diagnosis in 2022 and subsequently underwent multiple rounds of treatment, including four rounds of chemotherapy and later CAR‑T cell therapy, an immunotherapy that reprograms a patient’s immune cells to attack cancer.
In his memoir Did I Ever Tell You This? Neill recounted how swollen glands in his neck were initially misattributed to an undetected COVID infection before imaging and further testing identified the lymphoma. In late 2023 he announced on social media that his cancer had been in remission for eight months. He also told interviewers that he continued to receive regular infusions every two weeks, and in an April 2026 interview he stated he was cancer‑free.
About angioimmunoblastic T‑cell lymphoma
AITL is an aggressive subtype of peripheral T‑cell lymphoma that accounts for roughly 20 to 30 percent of PTCL cases. It most commonly affects older adults; the median age at diagnosis is about 65.
Symptoms can be nonspecific and sometimes mimic autoimmune disorders: prolonged fatigue, fevers, night sweats, weight loss, swollen lymph nodes and skin rashes are common. Because these signs overlap with many other conditions, AITL can be difficult to recognize early. Definitive diagnosis requires a tissue biopsy, and doctors often use blood tests, CT or PET imaging and bone marrow biopsy to stage the disease and guide treatment.
AITL impacts immune‑regulating T cells, which can both fuel tumor growth and disrupt normal immune function. Its exact causes are not fully understood; genetic mutations in precursor cells and secondary changes that alter gene regulation have been implicated. Many cases are associated with Epstein‑Barr virus (EBV) infection of nonmalignant cells in the tumor environment, which can complicate the disease biology.
Treatments, outlook and research
Initial therapies can produce remission or disease control, but AITL frequently recurs and remains challenging to manage long term. Responses to frontline treatment are often measured in months to a year or slightly longer, and patients may need subsequent lines of therapy. New approaches, including targeted agents and cellular immunotherapies such as CAR‑T, are being evaluated in clinical trials to improve outcomes.
Swaminthan Iyer, MD, a lymphoma specialist at MD Anderson Cancer Center, has noted that AITL can be hard to diagnose and treat because its symptoms are nonspecific and biopsies can be complex to interpret; expert pathology is often necessary. He and other specialists emphasize the importance of clinical trials exploring novel therapeutic pathways for patients with relapsed or refractory disease.
Neill’s family has not released further details about the circumstances of his death beyond their announcement. Tributes from colleagues and fans have been forthcoming, honoring a long career in film and television and remembering his openness about his health struggles in recent years.
