<P> Tom was born in Hinsdale, Illinois, to Charles and Marie Tom . She has a twin brother, David Tom, best known for his role as Billy Abbott on The Young and the Restless, and an older sister, Heather Tom, who is best known for her role as Victoria Newman on The Young and the Restless, and Katie Spencer on The Bold and The Beautiful . </P> <P> In 1992, Tom played the small role of Scott Scanlon's sister, Sue, on Beverly Hills, 90210 . In 1992 and 1993, she played Ryce Newton in the successful family movies Beethoven and Beethoven's 2nd . She did not appear in the subsequent sequels, as she had grown out of her specific role, although she did reprise her role as the voice of Ryce in the cartoon spinoff . </P> <P> From 1993 to 1999, she played the role of Mr. Sheffield's eldest daughter, Maggie Sheffield in The Nanny . </P> <P> From 1998 to 2006, she provided the voice for Supergirl in the DC Animated Universe . </P>

Who played the oldest daughter on the nanny
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