[citation needed] He started working as an assistant for screenwriter Daniel Petrie, Jr. in the '90s along with Scott Moore, who would become his longtime writing partner.
In addition, they both worked on providing uncredited rewrites on Wedding Crashers, 27 Dresses, Chicken Little, Monster-in-Law, and Mr. Woodcock.
However, their breakthrough success came with The Hangover, which became the highest-grossing R-rated comedy in the United States at the time.
Due to the success of The Hangover, the duo penned another R-rated comedy: the 2011 film, The Change-Up.
[1] In October 2012, they sold to ABC a pilot for a new comedy show named Mixology, which follows five guys and five girls "trying to find love at a trendy Manhattan bar," all over the course of a single night.