Ashton Kutcher and Mila Kunis spotted in Sydney

It's not known why the pair is currently Down Under, but the former That 70s Show co-stars visited the zoo together and hung out with celebs including Ruby Rose and Brian McFadden.

A spokesperson for the zoo said, "It was just the two of them and while they didn't want any photos taken, they were very pleasant and friendly."

Famous magazine reports that Kutcher was in town to promote his investment in the Airbnb company.

Photo: Twitter