Jakob Fine is a well-known menswear fashion designer.
Introduced in the Season Five episode Back in Baby's Arms, he meets Will Lexington at a restaurant while the latter is celebrating his birthday with Kevin Bicks. Ignoring Kevin, he hands Will an invitation to a trunk party. Kevin convinces Will to go but Will leaves after Jakob makes a pass at him, saying that Kevin does not need to know.
He is next seen in the episode Ghost in This House when he helps Will prepare for his Budweiser commercial. He asks Will if he is doing anything that evening and Will says he is in a relationship. Jakob alludes to the fact that Zach likes to play around, which Will does not believe. However, this urges Will to confront Zach.