His name is Logan Lerman.
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Percy's apartment is on East-One-hundred-and-fourth and First.
The actor Logan Lerman plays Percy Jackson in Percy Jackson and the Olympians: The Lightning Thief.
In the movie it was Logan Lerman.
Percy Jackson is a character in a series, not an actor. The actor who played Percy Jackson was called Logan Lerman and he didn't play Harry Potter and wasn't in any of the Harry Potter movies. Daniel Radcliffe, who is three years older and looks nothing like Logan Lerman, plays Harry Potter.
The first book of this series, called 'The Lost Hero' is set to be released on October 12th, 2010. From what is known at this point in time, the main character is named 'Jason'. Percy Jackson still plays a role, though he is no longer the protagonist. See 'related links' for more information.
Logan Lerman plays Percy.
Sally Jackson is Percy Jackson mother
Luke was played by Jake Abel. He also plays Brian in The Lovely Bones.
Annabeth plays quite a large part in the Percy Jackson series. Grover would probably be next up, since the three of them are always the ones who go on quests and things together.
Logan Lerman
The Percy Jackson Camp Half-Blood series ended with the fifth book, The Last Olympian. The next series came out, The Heroes of Olympus. Percy plays an important part in the series, although he is no longer the main character.