Apple.com has posted a brand new red-band trailer for the upcoming comedy Step Brothers, which brings all the laughter to theaters on July 25. Click below to see this R-rated trailer for yourself, but no kids allowed for this one.

CLICK HERE to check out the red band trailer.

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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: The Ballad of Ricky Bobby). 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.