Mindy Cohn
Mindy Cohn (born May 20, 1966) is an American actress, who appeared on VH1's List of "100 Greatest Kid Stars". She starred as Natalie Green in the sitcom The Facts of Life from 1979 to 1988, and is known for voicing Velma Dinkley in the Scooby-Doo franchise from 2002 to 2015, succeeding B. J. Ward.
Source: Wikipedia