Born in Detroit, Michigan. Prady began working in entertainment in 1982 at 'Jim Henson' Productions (then "Henson Associates") in New York. Prady worked on a variety of projects there, including writing for the "Jim Henson Hour" and writing "MuppetVision 3-D." the 3-D Muppet Movie that appears at Walt Disney World in Florida. In addition to his work with the Muppets, Prady has written a number of television specials including the "Presidential Inaugral Celebration for Children, " for which he won a CableAce Award, and "Miss Piggy's Hollywood, " for which he received a WGA award nomination. Prady co-wrote "The Muppets Celebrate Jim Henson", for which he received an Emmy nomination and a WGA award. He was a co-producer and writer for the series "Dream On" on HBO. Among his other sitcom credits are The Cosby Show (1984) and Married... with Children (1987). He served as producer and consulting producer on the NBC series Caroline in the City (1995) served as co-executive producer on the ABC series Dharma & Greg (1997). At present he is writing and co-executive producing The Big Bang Theory (2007) which he also co-created.