Van Dyck was the daughter of actor Leo de Hartogh and actress Teddy Schaank.

The actor Ko van Dijk Jr. was her stepfather.

On 7 January 2010, Van Dyck received the distinction of Knight in the Order of the Netherlands Lion.

In 2016, she divorced film script author and later psychotherapist Willem Jacob Nolst Trenité after 27 years of marriage.

Van Dyck suffered a cerebral infarction in 2021, which left her permanently partially paralyzed.