One of the film’s producers, Walter Parkes, tells PEOPLE the four actors played off each other seamlessly.
“They’re all so funny and they’re so different physically and yet there’s something about this group of friends that you just feel very kind of satisfied at the end,” Parkes explains. “I think we were benefitted by the fact that Zach and Jon go back many, many, many years, they’re very good friends, and so that had the opportunity for them to form together.”
But the most surprising performances may come from Gadot and Hamm, Parkes says.
“[Jon]’s most noble role is as this dark mysterious figure Don Draper, but he turns out to just sort of have mastered comic timing,” he says.
For more on Jon Hamm and Gal Gadot, pick up this week’s issue of PEOPLE, on newsstands Friday
Turns out, Israeli-born Gadot, who made her debut as Wonder Woman in Batman v Superman, has a humorous side herself.
“In some ways I find particularly for a non-originally U.S. speaker to be able to operate in comedies may be the hardest thing there is, and she was just so relaxed and precise and loose and never tried to play the joke but rather just play the reality of the scene and let the comedy come out organically,” Parkes says. “Just to literally have the verbal skills to be able to do that makes me think that there’s nothing this gal couldn’t do.”
Keeping Up with the Joneses opens in theaters Oct. 21.