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Potter Persona Professor Gilderoy Lockhart

Life before Harry The film may still have Harry Potter in the title, but Kenneth Branagh threatens to steal the show as Gilderoy Lockhart, the vain Defense Against the Dark Arts professor. The onetime do-it-yourself Shakespeare wunderkind, now 42, split from wife Emma Thompson in 1995. He ended a relationship with Helena Bonham Carter in 1999 and is now reportedly seeing a TV-and-film art director, Lindsey Brunnock.

Muggle shot Kenneth Branagh
Potter Persona Lucius Malfoy

Life before Harry Playing devilish Lucius Malfoy (Draco's dad) was surprisingly tough for the Patriot baddie, and new father, Jason Isaacs. "It's hard to be an evil lord when you can't help bursting into tears at the slightest thing," says Isaacs, 39, whose wife, Emma Hewitt, 36, gave birth to daughter Lily in March. He's already eager for Malfoy's next appearance, in the fourth Potter movie: "My unborn children are relying on that film!"

Muggle shot Jason Isaacs
Potter Persona Tom Riddle

Life before Harry His English boarding-school education left Christian Coulson well-prepared for his role as former Hogwarts BMOC Tom Riddle. But he wasn't prepared for the slow shoots (one week, "I just shouted 'No!' all day," says the single Brit, 24) or the onset of fame. When the society page of a British mag reported that he read his scripts in the members-only Soho House, "I started to think someone was spying!" he says.

Muggle shot Christian Coulson