"They're great — they've just celebrated 25 years together!" she told Usmagazine.com at the London premiere of Fool's Gold on Thursday. "They definitely know the secret."
The actress, 28 — who split from husband Chris Robinson last year — reignited her romance with on-and-off beau Owen Wilson in February.
"It's hard" maintaining a love life, career and raising son, Ryder, 4, Hudson admitted. (Click here to see how she and other stars bundled their babies for winter.)
"I make sure my priorities are right," Hudson told Us. "The examples I set are just how I am with my family, and nobody knows that but me, my closest friends and family."
Shiloh & Angelina
Suri and Katie
Ryder and Kate
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