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Answers: how old was Amanda Bynes when she acted on the Amanda show? The show aired in 1999. I believe she was 13 when it started. she was 11 or 12. im not sure. Im pretty sure she was around the age of 13. she was about 10,11,or12 somewhere around that. According to the Internet Movie Database, she was 13 when she first started it. She was 13 she was 13 when she started in 1999 and ended at age 16.
http://www.imdb.com/name/nm0004789/
check it out she was 13 years old

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