*Why* do people think this is nepotism?
He's only ever been a recurring guest star on a few TV shows, he had a short lived crimes series, and yeah, sure, he does a lot of movies, but they're mostly all relatively unknown indie flicks. A good portion of the time, he plays someone creepy, strange, or odd. He's not exactly well-known. Yeah, is it easier for him make connections because he's met a lot of people in the industry? Sure. But his career, though interesting and prolific, is not exactly on par with say, Kate Hudson, who is the daughter of some very well-known actors, and not nearly as charming as her mother.
share