It's that time again! Some of the biggest names in Hollywood stepped out to celebrate Halloween 2013, dressed as film characters, other A-listers, comic superheroes and much more! Check out some stars -- including Hilary Duff, Vanessa Hudgens and John Stamos -- who went the extra mile to get decked out for some of the biggest Halloween parties of the season.
Alyson Hannigan and Alexis Denisof
Luck of the Irish! Alyson Hannigan and her hubby Alexis Denisof are known for their matching family Halloween costumes. And on Oct. 31, 2013, they didn't disappoint, dressing in leprechaun garb as their daughters Satyana and Keeva wore rainbow and treasure costumes while trick or treating in Los Angeles' Brentwood neighborhood.