Nina Keogh (born in 1946 in Toronto, Canada) - is a Canadian puppet builder and puppeteer from Toronto. She is a former member of the Academy of Canadian Cinema and Television, Canadian Actors' Equity Association, UDA, and is an ACTRA member since 1968. She was on the board of directors for ACTRA and the Children's Broadcast Institute. She has worked for TVO and CBC Television. She is best known for playing the role of Muffy the Mouse in TVO's 1981-87 TV series Today's Special, which was shown worldwide including on Nickelodeon in the United States. Her father, John Keogh, played Howard the Turtle on Razzle Dazzle. She starred in Disney movie, The Santa Clause, as Judy.