James Gunn's Surprise: Polka-Dot Man

When director James Gunn cast David Dastmalchian as supervillain Polka-Dot Man for "The Suicide Squad," he had no idea that the actor had vitiligo. Dastmalchian polka dots are a result of this skin condition, and as a child, other people teased him with names like "polka dots" and "Dalmatian."