Kellie Martin: Kellie Martin. Actress: ER. Kellie Martin is an American actress from California. She has often worked as a voice actress in animation. Her most notable roles include the amateur detective Daphne Blake in the animated series "A Pup Named Scooby-Doo" (1988-1991), the nerdy daughter Rebecca "Becca" Thatcher in the drama series "Life Goes On" (1989-1993), schoolteacher Christy Huddleston in the period series "Christy" (1994-1995), leading lady Roxanne in the musical...
