John Miller's daughter, Violet, has a small role in Jennifer Garner's Netflix comedy film Family Switch. Violet plays a teenage violinist in an orchestra in the movie. Garner, who also produced the film, offered the opportunity to Violet and she even auditioned for the part. Sources reveal that John is encouraging his daughter's acting career because Jennifer loves it so much. The movie follows a family who swap bodies and must navigate each other's lives.

Garner and Miller attended the film's premiere together and are reportedly in a great place in their relationship.