Barry Mendel will produce the film with Roy; Mandate Pictures' head of production Nicole Brown will executive produce with Nathan Kahane.
Murphy will play a split personality fooling the town into believing his two 'alters' are man and wife. Page plays a struggling young mother who holds the key to his past and sparks a battle between the personalities.
The title refers to the town where they both live - Peacock, Nebraska.
Murphy is represented by UTA, Lou Coulson Agency, The Lisa Richards Agency and David Weber at Sloane, Offer, Weber & Dern.
Page is represented by WMA and Kish Iqbal at Gary Goddard Agency.