The movie was filmed in the Pittsburgh area at the Pittsburgh Crèche, U.S. Steel Tower, and PPG Place as well as Ligonier Diamond in Ligonier, Butler Memorial Hospital, Orchard Hill Church, Sewickley, Edgewood, Millvale, South Fayette, Mt. Lebanon, West Mifflin, Franklin Park, Churchill, Wilkinsburg, and Boyce Park.
Molly Gordon, who portrays Lauren Hesselberg, is the real life daughter of this movie's director, Jessie Nelson.
The film's original title was "The Most Wonderful Time".
The sisters played by Diane Keaton and Marisa Tomei seem to be at most 5 years apart in age. In real life, Keaton is 19 years older than Tomei.
Steve Martin narrates the first official trailer, which was released in August 2015. He also narrates throughout the film.