"LIVE's Best Halloween Show Ever: Nightmare on 67th Street" featured Kelly Ripa as Donald Trump and Princess Leia (and many others) and Michael Strahan as Cookie from Empire and Lando Calrissian from Star Wars (and many others).
Dozens of audience members, meanwhile, lined up outside of the show's New York studios wearing elaborate, funny or eye-catching costumes.
Many spent hours preparing for the show's annual costume contest, which can get pretty competitive. John Mulgrew, who said he's entered and been chosen as a finalist twice before, has been working on creating a functional dunking booth since August.
Others spent their hard-earned dollars to create dazzling pieces that will help them stand out from the crowd. Jimmy Zamzow said he spent $500 on feathers for his majestic peacock costume.
Still others went for timely costumes. Nine-year-old Sean Gonzalez dressed as Marty McFly and his dad Luis was Doc Brown from Back to the Future. Fans celebrated the day the characters traveled to in the franchise last week.