"Did we just become best friends?" Step Brothers is one of the most beloved — and the most quotable — comedies of the 2000s. The third feature film written by Will Ferrell and Adam McKay, this goofball hangout movie is about two oversized kids named Brennan Huff (Ferrell) and Dale Doback (John C. Reilly) who become mortal enemies, and then BFFs, when their parents (Mary Steenburgen and Richard Jenkins) get married. Along the way, they clear out some room for activities, save the f—ing Catalina wine mixer, and get sweet revenge on a gang of preteen bullies. Now, join EW as we follow up with the Step Brothers cast 15 years after its premiere in 2008.