I recently took up the project of making one of my favorite celebrities, Joel McHale. He's the host of E!'s TV clip show The Soup and also plays Jeff on NBC's Community.

This is my first time trying to make a celebrity sim, so I would like suggestions on how to make my sim look more like the real thing!

Good start! I think the eyes need to be smaller in scale; the nose larger in scale above the nostrils; and the chin a bit less square. Maybe shorten the nose and/or turn the nose tip up a bit.

Yeah, nose should be shorter (look at distance between his nose & upper lip ) ,maybe chin must be put down a bit, at the 2nd comparing picture I saw that eyes need to make deeper, and perhaps you should tilt his eyebrows into the center.