Kirsten Prout Kirsten Prout

When Kirsten Prout's agent suggested she take a role in MTV's My Super Psycho Sweet 16 Part 2,  the Twilight: Eclipse actress says she thought, "Are you kidding?"

But once Prout read the script, she loved it. "You can take this material that's geared to a certain demographic, but give it depth, smarten it up, make it fun, and also give it heart," Prout tells "It's got that John Hughes feeling, but it's also got that Halloween vibe."

The TV movie, premiering Oct. 22 at 10/9c on MTV, is a sequel to last year's flick about a roller-rink massacre during a Sweet 16 party.  Prout, 20, stars as Alex, whose world is shaken up when Skye (Lauren McKnight), the half sister Alex never knew she had, comes to town. Alex is even more shocked when she learns that Skye is the daughter of Charlie Rotter (Alex Van), the serial killer from the first film.

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"Alex is someone who gets very panicked very quickly," Prout says. "When Skye comes to town, all her anxiety that she usually feels just spikes. It's hard for her to cope at first, but she's also excited she has a sister now — someone to confide in. And perhaps she [now] has a genuine friend.

And is it just coincidence that the TV movie sounds a lot like MTV's reality series My Super Sweet 16, which follows rich kids as they plan their over-the-top Sweet 16 parties? "If anyone watches the show, you know you're envious of those girls, but at the same time you want them to get what's coming to them," Prout says."These kids just need a good scare and realize how [material] things aren't that important. The film does that to the extreme."

Watch the trailer for My Super Psycho Sweet 16 Part 2 below.