The actress or the character?
The actress is Ashley Greene, the character was Mary Alice Brandon
Ashley Greene
Mary Alice Brandon Cullen.
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Her real name is Ashley Greene
Mary Alice Brandon is Alice's real name, the one that she was born as a human with.
Jackson Rathbone
Alice's full name is Mary Alice Brandon Whitmore Cullen. Mary Alice Brandon was her human name, but after she married Jasper his last name ( Whitmore ) was added on to her name. When she became a " daughter " of the Cullens their last name was then, added on to her's.
kellan lutz
Rathbone. His name in real life is Jackson Rathbone
His real name is Peter Facinelli His name is Peter Facinelli
Her name is Mary Alice Brandon, but when she became a vampire and joined Carlisle's family it was Alice Cullen. The actress who plays her in Twilight, New Moon and Eclipse is Ashley Greene
Peter Facinelli
Elizabeth Reaser plays Esme Cullen