The estranged couple reunited to take their children - Dylan, 13, and Carys, 10, - to celebrate Halloween in New York, reported Us magazine.
"My son Dylan was a Hobbit, my daughter Carys was a kind of flapper, and Catherine was Snow White. I was late. I grabbed a mask at the store, it said Mike Meyers on it, and I said, 'I don't remember this character that Mike Myers did'," Douglas said during his appearance on a chat show.
Douglas, 68, and Zeta-Jones, 43, announced in late August that they were taking some time apart to "evaluate and work on their marriage.