Kellie Noelle Martin (born October 16, 1975) is an American television actress who is known for her roles as Rebecca Thatcher on Life Goes On, Christy Huddleston in Christy, Lucy Knight on ER, and Samantha Kinsey in Mystery Woman.
Martin was born in Riverside, California, the daughter of Debbie, a kindergarten teacher, and Doug Martin, a department store buyer and retail executive. Martin loved to perform for her close-knit family. She began her acting career at age seven, when her aunt Rhonda Jett, a nanny for actor Michael Landon's children, helped Martin land a guest spot on the Landon produced series Father Murphy.
Among many roles in motion pictures, made-for-TV movies and television series, she is perhaps most famous for her role as Rebecca "Becca" Thatcher on the drama Life Goes On, which ran on ABC (1989–1993), and for her role as med student Lucy Knight on the NBC drama ER (1998–2000). Martin also contributed the voice of Daphne Blake on the animated series A Pup Named Scooby-Doo and that of Molly Tasmanian Devil on Taz-Mania, and made several appearances as Tracy Nash on Valerie's Family. She also played the role of Emily in 1989's Troop Beverly Hills and Sherry in 1993's Matinee.