Julien has brown skin, and he is bald with only a couple of dots on his head. He wears a green shirt, blue pants, and dark blue shoes.
- He has 9 buddy stars in "Clarence's Millions".
- He is one of the two characters (the other being Clarence) who break the fourth wall in the intro.
- In "Too Gross For Comfort", it's revealed that he used to have a botfly maggot inside his arm while visiting Belize.
- There is an error in "Average Jeff" where he has Sumo's skin color and shirt for a brief moment.
- This happened again in "Classroom".
The gallery for Julien can be found here.