Aaron Lopresti is an American comic book artist who has worked for Marvel Comics, DC Comics, Dark Horse Comics, CrossGen Comics and Image Comics.

Sludge is a comic book series from Malibu Comics, set in the Ultraverse. It was created by Steve Gerber, Gary Martin and Aaron Lopresti. It depicted a dirty cop called Frank Hoag who was killed by the local mafia and was transformed after his death into a superpowered and viscous creature, called Sludge.