John — who has written iconic comedy films such as Meet the Fockers, Zoolander, and Along Came Polly — told us that when he gets an idea for one of his films, he tries to write characters that are "as real as possible without even thinking" about the actors that will sign on to the project.

After previously working with Kevin on Night School, John felt like he would be "perfect" to play the role of Sonny.

"Once he got on board, there was a big rewrite with Kevin, and [him and I] would have these long phone conversations, and I would just be typing as quickly as I could because he's so funny," John said.

Since Kevin's style of comedy is to "riff in a million different directions," the director laughed, telling us that "they were some of the funniest phone conversations."

John admitted that after Kevin was attached to the project, the dialogue in the script was changed. "Kevin has such a specific voice that, for whatever reason, I think he and I work well together and I was able to capture it," he said.

As for Mark, the duo approached the actor to play the role of "wannabe George Clooney," Huck. Though the internet can't stop talking about Mark's nude scene in the film, John told us that it's the "little things" that Mark added to his character that really made them laugh, such as when Mark calls someone "stupid" in the film.

"That cracked Kevin and myself up," John laughed.