From Wikipedia, the free encyclopedia. Christopher Daniel Barnes (born November 7, 1972), also known professionally as C.D. Barnes and C.B. Barnes, is an American actor. He is best known for providing the voice of Peter Parker/Spider-Man on the 1994 Fox animated television series Spider-Man: The Animated Series, and for his portrayal of Greg Brady in the films The Brady Bunch Movie and A Very Brady Sequel. He was once the national teenage spokesperson for Greenpeace. Description above from the Wikipedia article Christopher Daniel Barnes, licensed under CC-BY-SA, full list of contributors on Wikipedia.