Odds are your commute to work this a.m. was a little different. Instead of the usual lineup of individuals in business casual, you may have spotted a few more cat ears than on a normal Friday morning — maybe even a wig or two. Yes, after much anticipation, Halloween has arrived and it's time to start showing off your costume savvy. Luckily, our favorite celebrities and fashion folk have already kicked things off.No matter where you fall on the enthusiasm scale — planner extra lazy , or oh-my-god-the-party-is-in-an-hour — there's costume inspiration anywhere you look, courtesy of the people who take this holiday very seriously. Chrissy Teigen got in the game before we even started tallying and Heidi Klum has yet to make her big reveal for this year, but plenty of others have put their best costumed foot forward.The weekend is young, but we're getting a head start thanks to the celebs who have already begun to share their brilliant ensembles. Ahead, see how some of our favorite creatives are showing off their props this year. You may want to consider a last-minute costume switch.