The movie starts off telling the audience it is not a movie about romance, which further emphasis it as being a movie about love, romance and relationships.
Joseph Gordon-Levitt in the past was very active in TV series like 3rd Rock from the Sun, and won awards for his performances. He took time off to attend Columbia University which resulted in his absence from the motion picture industry. This movie is the first leading role in a Hollywood blockbuster since his return from Columbia University. Here Gordon-Levitt is partnered with Zooey Deschanel, who makes a perfect couple, both delivering a believable performance of a relationship that is sometime hot and sometime cold. Something many relationships will go through, hence easy for the audiences to relate.