Ghostbusters

Ivan Reitman / Jason Reitman: Ivan Reitman has been a force in American comedy for years, directing hits such as "Ghostbusters," "Kindergarten Cop" and "Stripes." Son Jason hit the ground running, acting in some of dad's films ("Dave") before forging his own directing career, hitting... more a high note with the blistering "Thank You for Smoking," which is also an apt description of his career.

(Eric Charbonneau/WireImage.com)