It reminded me of All of Me, that movie where Steve Martin's body is possessed by Lily Tomlin.
From the moment we hear the inner voice from Melanie, the film derails from its attempt to be a combo rip-off of "The Invasion of the Body Snatchers" mixed with "All of Me," and heads down the path of unintentional laughs.
Ronan is one of our most promising young actresses, but listening to her wrestle for command of her own brain made me yearn for Steve Martin's antic duels with Lily Tomlin in "All of Me." Martin's bisexual split personality spilled out into the way he held himself, the way he walked, and ate, and urinated.
Director Andrew Niccol (who also adapted Meyer’s novel) dramatizes this by having Melanie speak telepathically to Wanderer, who in turn responds with spoken dialogue — which, for a while, gives “The Host” the strange tenor of a 1950s women’s psychodrama crossed with a 1980s body-switching comedy: “The Snake Pit” meets “All of Me.”