31 Secrets You Never Knew About Your Favorite Christmas Films

Yes, you can quote every single line in Home Alone. You've watched Elf more times than you can count. You once stayed up for an entire A Christmas Story marathon on Christmas Day. In short, you know your Yuletide classics.

Or do you? We've dug up some fascinating factoids about 30 holiday films, and we're willing to bet a fishnet-clad leg lamp that many will come as news to you. Some films marked the debut of future Oscar-winners. Some involved nefarious plots to off child actors. And some featured surprise cameos, awkward errors, and serious Hollywood trickery.

Read ahead so you can show off during your next family viewing of National Lampoon's Christmas Vacation or It's a Wonderful Life.