Many were wishing for a warming spell to ward off the chilly air, but some, like Tyler Rosier, were staying quite toasty in their long black robes.
Rosier also sported a "Death Eater" tattoo scribbled in marker on his forearm.
"There's other Slytherin around here," Rosier said about the house at Hogwarts he represented.
Gwen Blount-Nuss, who traveled with Rosier and several other friends from Georgia Southern University to experience the movie in IMAX, was excited to see her favorite book in film.
"It's definitely the most epic book," Blount-Nuss said. "It's all leading up to this."
For Rosier and others, the movie marked a bittersweet moment as the billion-dollar franchise comes to a close next summer with the second part of Harry Potter and the Deathly Hallows .
That will put an end to an era for the Croft family of Evans, who have attended book and movie release parties for years.
Bill Croft sported a homemade blue cape imprinted with stars and a floppy cap as homage to Hogwarts School of Witchcraft and Wizardry headmaster Albus Dumbledore.
His wife, Tricia, and daughter Katherine had similar outfits and chatted excitedly about the midnight showing.
Katherine Croft said the books teach important lessons about the loyalty of friends and how our choices, not abilities, mold who we are.
"I'm going to miss Hogwarts," she said.