The jury however found Casey Anthony guilty on four counts of providing false information to law enforcement.
Clutching the hand of her defense attorney Jose Baez, Casey Anthony began to sob as the verdict was read.
Her parents, Cindy and George Anthony, left the courtroom as Judge Belvin Perry read further instructions to the jury and did not join their daughter in the courtroom.
Casey Anthony, who sat grim faced throughout the six weeks of testimony, beamed happily as she was fingerprinted the courtroom for her conviction of providing false information to law enforcement.
Outside the courtroom, spectators screamed "Lord!" as the learned of the not guilty ruling.
At the heart of the case was Casey Anthony's fantastic lie that a babysitter named Zenaida, referred to in court as "Zanny the nanny," had stolen Caylee Anthony.
Prosecutors claimed that Casey Anthony killed her daughter by drugging Caylee with chloroform and suffocating her with duct tape over her mouth and nose.
She killed Caylee, prosecutor Jeff Ashton claimed in his closing argument, because Casey Anthony had to choose between her child and "the life she wanted."
more details at ABC.com