Hayden Panettiere's Halloween costume really is the cat's whiskers. The 25-year-old pregnant star took to Twitter on Friday to share a rather scantily clad snap of herself dressed up as a cheetah.

"On Halloween night, NY's Halloween Parade calls on Cat Ladies of every purr-suasion to don your finest tails and whiskers, and join the Ball," the parade website says. Here's everything to know ...