Improvisation: Much of the film's dialogue was improvised by the actors, particularly Will Ferrell and John C. Reilly.
The Catalina Wine Mixer: The iconic Catalina Wine Mixer scene was filmed at the Trump National Golf Club in Palos Verdes, California.
Familiar Faces: Several actors from other Adam McKay and Will Ferrell films make cameo appearances in "Step Brothers," including Adam Scott, Kathryn Hahn, and Rob Riggle.
The Boats and Hoes Song: The rap song "Boats 'N Hoes" performed by Will Ferrell and John C. Reilly's characters was written by Adam McKay, Will Ferrell, and John C. Reilly.
Deleted Scenes: Many scenes were cut from the final version of the film, including an alternate ending where Brennan and Dale reconcile with their families at Christmas.
The Drum Set Scene: The scene where Brennan destroys Dale's drum set was largely improvised.
The Prestige Worldwide Presentation: The elaborate Prestige Worldwide presentation was entirely improvised by Will Ferrell and John C. Reilly.
The Bunk Bed Scene: The bunk bed scene, where Brennan and Dale argue over who gets the top bunk, was inspired by a real-life argument between Adam McKay's children.
Critical Reception: "Step Brothers" received mixed reviews from critics upon its release but has since gained a cult following and is considered a comedy classic.