MARTY CALLNER is an award-winning director and producer, known for his work with legendary artists such as Robin Williams, Madonna, George Carlin, Cher, Jerry Seinfeld, Aerosmith, Chris Rock, The Rolling Stones, Justin Timberlake, and many more.  He began his career directing television news, quickly became the director for the Boston Celtics for WBZ-TV, then started his relationship with HBO by producing the Wimbledon tennis tournament, and went on to direct numerous sports, comedy, and music specials that launched the fledgling network into the powerhouse it is today.  He has created a plethora of #1 music videos, comedy specials, and TV shows, including HBO's smash hit "Hard Knocks."  Callner has won Emmys, MTV Music Video Awards, DGA awards, cable ACE honors, and his work on Aerosmith's "Cryin'" was voted MTV's best music video of all time.