Kristen Stewart, then 18, starred as 17-year-old Bella Swan.
“Twilight” begins with Bella moving from Phoenix, Arizona to Forks, Washington to live with her dad.
Stewart was already an established actor when she landed the role of the “Twilight” protagonist, having starred in movies like “Panic Room” and “Into the Wild.”
Robert Pattinson played Edward Cullen, who was turned into a vampire when he was 17 years old. The British actor was 22 at the time.
Technically, Edward was more than 100 years old. He was turned into a vampire in 1918 as he was on the verge of dying from Spanish influenza.
Before playing a brooding vampire in “Twilight,” Pattinson starred as Cedric Diggory in “Harry Potter and the Goblet of Fire.”
At 16 years old, Taylor Lautner was close in age to his character Jacob Black, Bella’s friend who had a crush on her.
Jacob was 15 in the first movie. Jacob became part of a love triangle with Bella and Edward as the franchise went on.
At the time, Lautner was known for roles in “The Adventures of Sharkboy and Lavagirl in 3-D” and “Cheaper by the Dozen 2.”
Billy Burke, then 41 years old, played Charlie Swan, Bella’s dad.
He was a police chief in Forks and had an affinity for steaks. Charlie’s age wasn’t specified in “Twilight.”
Before starring in the “Twilight” franchise, Burke had roles on TV shows like “Gilmore Girls,” “Law & Order,” and “24.”
Gil Birmingham, 55, portrayed Billy Black, Jacob’s dad.
He was best friends with Charlie and his age was unclear. Billy and Jacob were part of the Quileute tribe.
Before “Twilight,” Birmingham guest-starred on shows like “Buffy the Vampire Slayer,” “Charmed,” and “Veronica Mars.”
Peter Facinelli, 34, starred as Dr. Carlisle Cullen.
Carlisle and the Cullen family distinguished themselves from other vampires because they hunted animals, not humans.
Before “Twilight,” Facinelli starred in the ’90s movie “Can’t Hardly Wait” and the drama series “Fastlane.”
Elizabeth Reaser, then 33, portrayed Esme Cullen, Carlisle’s wife.
Carlisle and Esme moved from town to town every couple of years with their adoptive children to avoid suspicions about their unchanging physical appearances.
Outside of “Twilight,” Reaser guest-starred on shows like “Law & Order: Criminal Intent,” “The Sopranos,” and “Grey’s Anatomy.”
