By Michelle Ward
Updated October 30, 2010 07:00 PM
Michael Kovac/FilmMagic

When announcing their separation, Courteney Cox, 46, and David Arquette, 39, were vocal about remaining responsible parents to their daughter, Coco, 6. And it looks like they are making good on that promise.

The family will spend Halloween trick-or-treating together. “Sunday, yeah we go trick-or-treating,” Arquette said at the screening of his short film The Legend Of Hallowdega presented by AMP Energy Juice on Friday at the Hollywood Roosevelt hotel. “Coco is going to be a bumblebee and Courteney is going to be a sunflower.” As for his own costume, Arquette is looking for something to match and joked, “I’ll put on a flower suit or something.”

It won’t be the first costume the actor will put on for the holiday. Arquette will be in Las Vegas on Saturday night and plans to dress as Elvis, along with two friends. “We’re going to be all three walking through the place,” he said, “It’s going to be ridiculous.”

Arquette also plans to have a lot of fun at his new event, David Arquette Presents Beacher’s Madhouse, at the famed Hollywood Roosevelt Hotel. The Vaudeville-themed party is a setting close to Arquette’s heart. “My family goes back two generations, three generations to Vaudeville and it’s always been in my heart and something I love,” he said. “[It’s] a lot of fun, people laughing, dancing just having a blast.”