Hilary Duff and her ex-husband Mike Comrie finalized their divorce last week, and this week they’re on vacation in Hawaii with their 3-year-old son Luca.

As we previously reported, their divorce was finalized two years after they first separated, as they had tried to work it out before calling it quits for good.

E! Online reports the former couple were seen walking on the beach together on Feb. 4.

“We have such a great kid, and we're both so obsessed with him,” Duff told Ellen DeGeneres during an appearance on her show this week.

“We are good friends and we laugh a lot and we have a great communication,” she added. “We share pictures when one is not with Luca. Yeah, he's great. We are great and we keep on trucking."