January 2015: filming in a small town near Pittsburgh called Millvale.
The film's original title was "The Most Wonderful Time".
Molly Gordon, who portrays Lauren Hesselberg, is the real life daughter of this movie's director, Jessie Nelson.
Was filmed with the title "Let It Snow".
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.