According to Deadline, which broke the news on Monday (Sept. 16), the "Twilight" star will play the "tough and beautiful" Rosita Espinosa, a character who was introduced in Issue 53 of the comic book when she and her travelling companions, Eugene and Abraham, encounter Rick and his group at Hershel's Farm during their journey from Houston to Washington. No word yet on whether Eugene and Abraham will also be introduced this season.
Serratos will have a recurring role during the upcoming fourth season with an option to become a series regular in Season 5. She's just the latest comic character to join the series in Season 4 following the addition of Larry Gilliard Jr. ("The Wire") as Bob Stookey, a former Army medic haunted by his past.
The 22-year-old actress is best known for playing Bella's (Kristen Stewart) best friend Angela in the "Twilight" movie franchise. Her TV credits include "Ned's Declassified School Survival Guide," "American Horror Story" and "The Secret Life of the American Teenager."
The casting news comes the same day as reports surfaced that AMC is developing a "Walking Dead" spin-off series set to debut in 2015 with an entirely new story and cast of characters.
“After 10 years of writing the comic book series and being so close to the debut of our fourth, and in my opinion, best season of the TV series, I couldn’t be more thrilled about getting the chance to create a new corner of 'The Walking Dead' universe," creator Robert Kirkman said in a statement, according to TV Line.
"The opportunity to make a show that isn’t tethered by the events of the comic book, and is truly a blank page, has set my creativity racing.”
This comes after the cable network decided to move forward with a spin-off of "Breaking Bad" titled, "Better Call Saul." Both dramas have also spawned post-show companion series, "Talking Dead" and "Talking Bad."
The recent focus on spin-offs of their most successful series comes as AMC is nearing a transitional phase with the ending of "Breaking Bad" and "Mad Men," the recent cancellation of "The Killing" and the tepid response to newcomer "Low Winter Sun," as well as a slate of low-rated reality shows.
New shows on the horizon include dramas "Halt & Catch Fire" and "Turn," which will debut in 2014.
"The Walking Dead" Season 4 premieres Sunday, Oct. 13 at 9/8 p.m. CT on AMC.