Her first acting experience took place in 1997 in the promo for McDonald's. Then she was offered a very small part in TV series "Goosebumps", followed by the appearence in films "Elvis Meets Nixon" and "In His Fathers Shoes". AJ was continuing to build her career with shooting in "The Virgin Suicides" in 1999. She was acting as a one of five sisters, fascinated by suicide. Then the girl was offered a part in "Higher Ground" as a teenage girl attending a school for hard children. There was only one season that ended with a beginning of relations with the character of Hayden Christensen, who co-starred in the series.

In September of 2001 Andrea has been married with her boyfriend Nathan Andersen with whom they were dating since meeting at Utah Valley University. In 2008 she presented her husmand with a daughter. According to Aj's words they are the happiest couple ever and they felt really blessed and lucky for being together and having such a wonderful child.