<Tr> <Th> Occupation </Th> <Td> Actor </Td> </Tr> <Tr> <Th> Years active </Th> <Td> 1986--1994 </Td> </Tr> <P> Brian Eric Bonsall (born December 3, 1981) is an American rock musician, singer, guitarist and former child actor . He is perhaps best known for his roles as Andrew "Andy" Keaton, the youngest child on the NBC sitcom Family Ties from 1986 until 1989, and Alexander Rozhenko, the son of Worf and K'ehleyr, on Star Trek: The Next Generation from 1992 to 1994 . </P> <P> Bonsall was born in Torrance, California . In 1986, he began playing the role of Andy Keaton in the sitcom Family Ties . Bonsall won three Young Artist Awards for his performance on the series . He was also nominated for a Young Artist Award for his starring role in the made - for - TV movie Do You Know the Muffin Man? in 1990 . </P>

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