Bill and Teddy Will Be Heavyweight Opening Acts for Kerry - Hollywood contingency will be strong at Democratic Convention By Maria L. La Ganga, Times Staff Writer BOSTON — Former President Clinton will get the coveted primetime speaking slot on opening day of the Democratic convention here, while hometown favorite Sen. Edward M. Kennedy will speak during primetime on Day 2. Ben Affleck, Sean Astin, Larry David and two Baldwin brothers, Billy and Alec, are set to headline a sizeable Hollywood cast that also will be on hand, helping John F. Kerry accept his party's nomination for president next month....