Hilary Duff Co-Parenting with Ex ... It's Better at the Beach

9/5/2017 7:40 AM PDT

Hilary Duff Reunites with Mike Comrie for Beach Day with Son

Hilary Duff celebrated Labor Day with her son at the beach, and buried any ill will for her ex-husband in the sand ... all in the name of co-parenting.

Hilary and her ex, Mike Comrie, spent Monday in Malibu with their 5-year-old son, Luca. Hil was rockin' her usual 2-piece in the water while Mike chilled onshore.

Getting together for some R&R with their kid is right up the former couple's alley, post-divorce. They went on a family vacay last year to Maui ... so Labor Day teamwork seems to be a walk in the park for them.