David Warner, best known for his roles in "Titanic" and "The Omen," died on Sunday

The veteran actor's family confirmed his death "with an overwhelmingly heavy heart"

He has approached his diagnosis with grace and dignity over the last 18 months

He will be greatly missed by us and will be remembered as a gentle soul

Warner was living at Denville Hall in Northwood, UK, at the time of his death

He was also known for his role in the 1976 horror film "The Omen"

Warner addressed the iconic scene in a BBC programme in 2010

David Warner dead due to cancer illness at the age of 80

David was most famous for his role in James Cameron’s 1997 romantic epic “Titanic”

David's legacy of extraordinary work has touched the lives of so many over the years