The kids entertainers stepped out in Townsville, in north Queensland on Friday to grab ice cream, The Daily Telegraph reported.
In photos published on their website, the former couple looked as happy as ever, sharing smiles as they walked down the street.
Emma and Lachy announced their split at the start of August, but the yellow wiggle says a lot of people have wondered whether their breakup really was mutual.
"A lot of people have said to us that they just can't see how it can be so amicable," she says in a new interview with the ABC's Australian Story, due to air on Monday September 17.
"But truly, Lachy and I, we just get each other. Just because we're not romantically together anymore doesn't mean we're not together for the rest of our life.
In the same story, the 28-year-old revealed that their fellow Wiggles stars didn't actually know about the separation.
"The other Wiggles didn't know," she said. "I don't really think many people knew about it at the beginning.
"I think people recognised that maybe dynamically things had changed between us but there weren't any upset feelings. We were just trying to work out our friendship during that time."