Will Ferrell and John C. Reilly, who last teamed in the box-office smash “Talladega Nights: The Ballad of Ricky Bobby,” now star in “Step Brothers,” directed by Adam McKay (”Talladega Nights”). In “Step Brothers,” Ferrell plays Brennan Huff, a sporadically employed thirty-nine-year-old who lives with his mother, Nancy (Mary Steenburgen). Reilly plays Dale Doback, a terminally unemployed forty-year-old who lives with his father, Robert (Richard Jenkins). When Robert and Nancy marry and move in together, Brennan and Dale are forced to live with each other as step brothers. 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.