Addy's Great Aunt is Marjorie Strickland, whom was the sketch model for the original Snow White. It is her body movements, face and hair you see in Disney's Snow White and the Seven Dwarfs (1937).
Paranormal (2009) was the first movie that Addy worked with a black screen to help her become ghostly.
On October 22, 2017, Addy appeared in "The Walking Dead"'s 100th episode, "Mercy". She was asked to return to the show by Producer/Director Greg Nicotero to play tribute to her own scene from the pilot episode. Her scene was filmed in secret, even being kept from the star of the show, Andrew Lincoln, and her own father, family and friends! Nicotero wanted it to be a full surprise for everyone. It worked. Addy is the only child walker to appear twice, all other repeat walkers must be over the age of 18.
