In a statement, Hollywood actor Michael Douglas, her stepson, said: “She brought out the best in all of us, especially our father.
“Dad would never have had the career he did without Anne’s support and partnership. Catherine and I and the children adored her; she will always be in our hearts.”
Douglas’ youth was disrupted by the Second World War.
Her father owned a textile factory while her mother was a socialite – she stayed with the former following her parents’ divorce.
Douglas was sent to boarding school in Switzerland and, unwilling to return to Hitler’s Germany, continued her studies in Belgium.