birth_place birth_date known_for yearsactive spouse article_title name occupation
sydney , australia 29 september 1966 '' yakkity yak '' '' cj the dj '' 1987 -- present sandra walters mark gravas
 mark gravas director writer animator
mark gravas

mark gravas -lrb- born september 29 , 1966 -rrb- is an australian animator , director and producer .
he is best known as the creator/director of `` yakkity yak '' -lrb- 2002/2003 -rrb- , an australian/canadian co-production .
mark co-owns sydney based media production company kapow pictures with his partner sandra walters .
mark gravas directed the 2005 animated film '' '' , he also designed and directed the 2006 cartoon network production of `` casper 's scare school '' .
gravas also co-owns the creative company kapow pictures , based in sydney , australia .
