yes, blake lively credits! so as a director, tripp is a perfectionist and can come off as a prick because if he's gonna make a movie, he may as well have done it right. and i can see him being an opportunist and casting her because of the gossip girl hype. he's got the lovable douche vibe that affleck has going on and he has a reputation for reportedly hooking up with any good looking actress he works with.