Step Brothers (2008)

A comedy that brings together Will Ferrell and John C. Reilly, for the first time since "Talledega Nights: The Ballad of Ricky Bobby", as coddled guys who live with their respective single parents. Their folks fall in love and marry, making the guys stepbrothers. As their narcissism and downright aggressive laziness threaten to tear the family apart, these two middle-aged, immature, overgrown boys will orchestrate an insane, elaborate plan to bring their parents back together. To pull it off, they must form an unlikely bond that maybe, just maybe, will finally get them out of the house.

Official website: http://www.sonypictures.com/movies/stepbrothers/index.html