The actress was recognised by the animal rights organisation for her extensive work in the field during 2010, reports WENN.
Anderson spent the year campaigning for pet adoption, taking part in anti-leather advocacy in India and speaking to students at Oxford University.
She also appeared in a video for PETA which was subsequently banned in several international airports.
"For years, Anderson has been penning letters and posing in ads for PETA UK's American affiliate in order to raise awareness of cruelty to animals and demonstrate how easy it is to avoid contributing to animal suffering," a spokesperson for the group said in a statement.
