Published Thursday, 14 June 2012
The Oscar-winner and Hollywood superstar husband Michael Douglas have two children, Dylan and Carys, and own homes in New York, Bermuda and Spain.
But despite the family's estimated £110m fortune, their offspring are kept down-to-earth by their maternal grandparents, who take them to low-cost British holiday chain Butlins and relish the English rainy weather.
The actress tells Stylist magazine: "They love going to Butlins with my parents for long weekends.
"They've been on the beach when it's been horizontal rain in Swansea (Wales), you know? They can't believe it; they're on the beach and it's raining."
Despite their simple tastes, Zeta-Jones admits she's upset the pair don't share her passion for British food.
She adds: "They don't like Branston Pickle, to my horror. They don't like Yorkshire puddings, to my horror. They love a good shepherd's pie because they've been brought up with it, because it's pretty much all I can make fantastically well."