Walker Boone (born Theodore "Ted" Nicoloff; May 4, 1944 – January 29, 2021) was a Canadian actor. He was best known as the voice of the Nintendo character Mario in the DIC-produced animated series The Adventures of Super Mario Bros. 3 and Super Mario World.
Boone was born on May 4, 1944, as Theodore Nicoloff in Toronto, Ontario. He attended the McGill University Faculty of Law before changing to a teaching career in Ontario and London. In the 1980s, he left teaching to be an actor.
He had two children, Jason and Larissa Nicoloff, one grandchild and a partner, Vicki. He also owned a farm.
Boone died on January 29, 2021, at the age of 76, but his death was not announced until August 11 that year.