Gareth Williams is an American actor. He is probably best known from his role as Mike Potter, a recurring character on the television drama Dawson's Creek.He played astronaut James Irwin in the HBO miniseries From the Earth to the Moon, and was in such films as Malcolm X, Volcano, and The Cell. He has a long list of television credits including Time of Your Life, Angel, Law & Order, and Mad About You.Gareth Williams has an extensive list of film credits. His career began in New York where he studied with Uta Hagen for six years and did countless productions in and around NYC as well as regional theater.