'If I were you') is a 2007 English-language French thriller film directed by Vincent Perez and starring David Duchovny, Olivia Thirlby, and Lili Taylor.

The beginning of the film reveals the strained relationship between Hannah (Lili Taylor) and her teenaged daughter Samantha (Olivia Thirlby).

During a heated argument in the car with Samantha, Hannah's focus is momentarily diverted from the road, causing a head-on collision with an oncoming truck.

And she discovers that Samantha's life has been a challenge to meet her parents' expectations for academic excellence and behavior, all while being overwhelmed by adolescent hormones and a confused sense of self.

Hannah struggles to keep her grip; and Ben's possessiveness toward his wife's soul in his daughter's body threatens to completely overwhelm both of their lives, with nearly disastrous results.