While strictly legal blending involves marriage and custody, modern cinema has expanded the definition of the blended family through the "found family" trope. This is particularly prevalent in genre cinema.

The most successful modern films have abandoned the three-act structure of "meet, conflict, resolve." Instead, they embrace the episodic reality of blended life. Lady Bird (2017) shows a mother-daughter relationship so fraught that it feels like a divorce in miniature—and when the father tries to mediate, he becomes an unwilling stepfigure in his own marriage.

Despite this progress, modern cinema still struggles with three aspects of blended family dynamics:

The (e.g., the changing face of the stepmother)