Actor Dane DeHaan, who had lead role in Chronicle (the superhero movie directed by Joshua Trank based on a script by Max Landis), will play the role of Harry Osborn (the character played by James Franco in Sam Raimi’s Spider-Man film series):

A few words from Director Marc Webb:

“Dane is an exciting and extraordinary young actor and he is a fantastic addition to our cast.”

Director Marc Webb

Amazing Spider-Man 2 Movie – In theaters: May 2, 2014

Actor Andrew Garfield will reprise his role as Peter Parker aka Spider-Man. From what I heard the villain should be Electro.
:)