Ben Affleck is grateful for disagreements with his brother CASEY on the set of his film GONE BABY GONE - because the angry rows ultimately benefitted the film.
Shooting on the 2007 movie, directed by Ben and starring Casey, was slowed down by arguments between the siblings, who frequently disagreed about the direction the project should take.
But Ben, 35, is convinced the brothers' off-camera feuds helped make the drama a hit.
He says, "You're not doing the right thing if you're always just agreeing. The worst mistakes I've made have come when I have just agreed with people. So we went through some disagreements, but the scenes almost always got better because of that."