Amanda Joy Michalka, referred to as AJ Michalka, is an American actress, singer-songwriter, record producer and voice actress. She and her sister, Aly Michalka, make up the musical duo Aly & AJ. The two sisters signed with Hollywood Records in 2004. They released their debut studio album Into the Rush in 2005. The album reached number 36 on the US Billboard 200, and was later certified gold by the Recording Industry Association of America (RIAA). It has sold 839,000 copies domestically and one million copies worldwide.
Amanda has also worked in the films The Lovely Bones (2008), Secretariat (2010), Super 8 (2011), Grace Unplugged (2013), Weepah Way for Now (2015), and Support the Girls (2018).