It's a night (of the living dead) that they'll never forget!

Leah and Ethan thought they were in the middle of a typical prom photo session when a group of zombies walked in. "This is what happens when you try to take your prom photos next to The Walking Dead set!", says photographer Stephanie Smith.

The high schoolers from Senoia, Georgia definitely got the prom surprise of a lifetime when actors from AMC's hit show "The Walking Dead" sauntered into the photo shoot covered in blood and completely in character.  Stephanie Smith told People.com, “We had no idea where they came from. We all kind of laughed and were a little creeped out, but went on about our shoot.”

Just like the fake disease that's turning people into zombies in "The Walking Dead", Stephanie's "photo-zombed" pics are going viral.