A new cast member has joined “The Walking Dead” season 6 in a mysterious role, while the series’ showrunner talked about character deaths.

When the second half of “The Walking Dead” season 6 returns to the small screens, fans will see an expanded world and several new faces. One of those new faces will be actress Alicia Witts, E! News reported. Witts is known for her roles in “Cybill,” “Justified” and “Friday Night Lights.” She also appeared in “Two and a Half Men,” “Law & Order: Criminal Intent” and the hit series “Ally McBeal.” However, details about her role in the zombie apocalyptic series remain a mystery and has been kept a secret.

Witts also took to Twitter on Thursday, Feb. 4, to share the big news to her fans. “Proud & overjoyed to get to announce to you today: I'm joining one of the greatest shows ever made. #TheWalkingDead! @WalkingDead_AMC #TWD,” she wrote.

Meanwhile, “The Walking Dead” creator and showrunner Robert Kirkman shared his thoughts about character deaths during an “Inside the Actors Studio” interview that will air on Feb. 11 in Bravo, according to the same report. He described the character’s demise in “The Walking Dead” as “a tremendously powerful engine” that is very emotional and “drives this whole thing.”

"I like to say, ‘people gotsta die,' because you want people to—you never want to lose that…if you go too long a period with characters surviving and being safe, you lose that element of, ‘Oh my god any of these characters can go at any moment,’” Kirkman added.

The upcoming seasons of “The Walking Dead” may also see character death especially with the entry of the big bad villain Negan, to be played by Jeffrey Dean Morgan. Norman Reedus, who portrays the character Daryll Dixon in the AMC hit series, shared in a recent interview that the second half of “The Walking Dead” season 6 will bring a lot of turmoil to beloved characters of the show. He also hinted of an upcoming fight, although he did not disclose if it will be with Negan himself or Negan’s Saviors.

“The Walking Dead” season 6 returns on Valentine’ Day, Feb. 14 on AMC.