A new look at Blake Lively [1] and Anna Kendrick [2]'s new film, A Simple Favor, is here, and oh boy — this is gonna be good. The Paul Feig-directed thriller [3] stars Kendrick as Stephanie, who seems like she just wants to track down her missing BFF Emily (Blake Lively) . . . but what if she actually had something to do with her disappearance?

Although Emily has always seemed like an elegant, aspirational, and all-around put-together human being, she's also been hiding a dark side from both Stephanie and her own husband, Sean (Crazy Rich Asians [4] actor Henry Golding), which creates an even more complex mystery. "Five days ago, Emily went missing," Kendrick says in a voiceover in the teaser, below. "I'm realizing I don't know her as well as I thought I did."

Watch the latest trailer above before it hits theaters on Sept. 14.

Teaser 2:

Teaser 1: