Richard Linklater (Dazed and Confused, Before Sunrise) took 12 years to make his new movie, Boyhood. The star of Boyhood, Ellar Coltrane, was seven years old when filming started, and Linklater returned to the story every year for a few days of shooting to construct a movie about a boy growing from a first-grader to an adult and his changing relationship with his parents.
This looks amazing. What an undertaking.