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Olivia has brown eyes.
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Olivia is the voice actress for Shion Uzuki on the video game series Xenosaga.
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Some of Olivia's first works on TV were Wings and Phenom.
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Olivia first started her carrier working on television shows, but that later evolved into films.
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Olivia started out acting on the Los Angeles stage.
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Olivia was nominated for the Young Artist Award in 2000 and 2001. This award was from the show she was working on at the time, Hey Arnold!
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Olivia's first TV appearance was in a 1995 episode of Wings, entitled "A House to Die For."
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Olivia appeared in the "Top Ten Episodes of The Brady Bunch" special on TV Land as herself.
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Olivia first appearance on Nickelodeon was in 1996, as Rhonda Wellington Lloyd, on Hey! Arnold.
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Olivia's father's name is Michael Hack.
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Olivia's first movie appearance was in 1994's, Star Trek: Generations.
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Olivia is also known for her role on Any Day Now, replacing Mae Middleton as young Mary Elizabeth im season 4.
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Olivia's height is 5'2" (1.57 m).
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Olivia is most know for her role in the Brady Bunch movies as Cindy Brady.
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Olivia has a long history with animated projects. Including regular roles on Nickelodeon's "Hey Arnold!"; Fox Family's "Room 402"; and NBC's "Sammy." And she's also been a guest voice for such series as "Family Guy," "Rocket Power" and "Life With Louie."
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Olivia has appeared in nearly 60 commercials.
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Olivia started acting at the age of four.
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Olivia owns many pets, including a Yorkshire terrier named Pun.