Hayden Panettiere started filming her scenes for ‘Scream 4” yesterday. The Heroes hottie was spotted on the set of the horror movie at Woodsboro High School Ternes St Dearborn, MI. She was joined by another cast member Emma Roberts. The 19-year-old star will perform a nerdy film geek who happens to be a best friend of Roberts' character Jill. Scream 4 is scheduled to hit cinemas on April 15, 2011.