Twilight sparked a level of fandom that most movies hope to achieve but never do. Years after its initial debut, we’re still talking about the franchise!

The movies, inspired by Stephenie Meyer‘s novels about glittering vampires and werewolves, catapulted Kristen Stewart, Robert Pattinson and Taylor Lautner to international fame.

You might have watched the movies hundreds of time, but we bet that there are still secrets you are not aware of.

For instance, did you know that a very famous Harry Potter star was in the running for a role? A High School Musical actor also auditioned for a popular part.

In fact, one popular actress was in the running to play three different parts and never got cast.

Several actresses had to wear wigs, a key role was almost recast after the first movie and Robert was warned that he would be arrested if he did one thing wrong when he was first cast.

We rounded up 16 secrets from the set of the movie for you to check out!

Scroll through the slideshow to learn so much more about the hit franchise…