For the laid-back occasion, 39-year-old Kutcher sported a white button-down shirt with a navy flower print, and Kunis wore a black top with white embroidery.
The pair has been spending time in Hungary and were spotted with Justin Theroux watching Wiz Khalifa
perform at the Sziget Festival earlier this month.
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Kunis and Theroux are currently filming their movie The Spy Who Dumped Me
For more from Kunis and Kutcher, watch the clip below!