Check out the Red Band trailer for writer/director Bob Goldthwait‘s film World’s Greatest Dad starring Robin Williams. Surprisingly, it’s far more entertaining and foul-mouthed than what we’ve come to expect from Williams. This might be his return to a solid dramatic comedy.

The film appears to have a large amount of dark humor to go along with romantic comedy side of it. The film is about a unsuccessful-single father who is trying to raise a teenage boy who wants to spend his days “looking at vagina’s.”

Check out the trailer below. Beware it is Red Band and therefore is NSFW or the kiddies…

Not bad huh? It looks like Williams might be back on track. We all know he’s got it in him.

What do you think of the trailer?

The film will be in theaters August 21, 2009.