<Li> Kirsten Dunst as Mary Jane Watson: a Broadway actress, and Peter's childhood girlfriend . </Li> <Li> James Franco as Harry Osborn / New Goblin: the dedicated son of Norman Osborn and Peter's estranged best friend, who believes Spider - Man murdered his father, but after learning Peter is Spider - Man and his father was the Green Goblin, he tends to battle Peter directly as a psychopathic assassin armed with the same equipment as his father . </Li> <Li> Thomas Haden Church as Flint Marko / Sandman: a small - time thug with an estranged wife and sick daughter, whose struggle to rob for money to get his daughter treatment lures him into a freak accident that alters him into a master sand manipulator hunted by Spider - Man since he was Peter's uncle Ben's true killer . </Li> <Li> Topher Grace as Eddie Brock / Venom: a rival "Daily Bugle" photographer, who is exposed by Peter for creating a fake image of Spider - Man, and is ready for revenge when he bonds with the symbiote, turning him into monstrous being with the same spider - like powers . </Li>

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