Virginia native Jimmy Workman owes whatever fame he achieved to his older sister, actress-singer Shanelle Workman. At age eight, he accompanied her to an audition for the film "The Addams Family" where she was in contention for the role of Wednesday. Director Barry Sonnenfeld and producer Scott Rudin spotted the pudgy Workman and asked him to read for the part of Pugsley, the Addams son with a fondness for guillotines and other instruments of death. He proved impressive enough to land the role and made his feature film debut in 1991. Capitalizing on the success of the macabre outing, however,