The trivia items below may give away important plot points.
Even though Elizabeth Olsen (Gerry) and Boyd Holbrook (David) didn't end up together in the movie, the actors did however end up dating after meeting on the set of this movie. They even got engaged, but was later called off after they split.
Early on in the movie Lilly walks in on her father Edward having an affair in his office. Lilly's sister Eleanor is played by Kiernan Shipka. Kiernan Shipka, plays Sally Draper in the series Mad Men, where she walks in on her father ,Don Draper (Jon Hamm) in a simarily comprising position. (While this affair never comes out, Don's marriage doesn't survive his notoriously philandering ways. )