Amanda Joy Michalka (/miːˈʃɑːkə/ mee-SHAH-kə; born April 10, 1991) is an American actress, musician and singer-songwriter who is best known as one half of the musical duo Aly & AJ (briefly 78violet), alongside her older sister Aly Michalka. She has appeared in films such as The Lovely Bones (2008), Secretariat (2010), Super 8 (2011), Grace Unplugged (2013), Weepah Way for Now (2015), and Support the Girls (2018). Michalka also starred in the ABC sitcom The Goldbergs (2013–present) and its spin-off series Schooled (2019–2020). She is also known for voicing a lead role as Catra in the Netflix animated adventure series She-Ra and the Princesses of Power (2018–2020).
Michalka was born in Torrance, California and is the younger sister of actress and musician Aly Michalka. Her father, Mark, owns a contracting company, and her mother, Carrie, is a musician and performed with the Christian rock band "JC Band". Her parents are divorced. As a little girl, she briefly lived in Seattle and Milwaukee. Both she and her sister attended Mack Elementary. She has played the piano since she was six and started playing the guitar in her early life. She started acting when she was five, mostly in church play productions. She was raised as a Christian and homeschooled for part of her childhood. Michalka was in a number of musical productions at her school in Milwaukee as a young woman.
She plays a variety of instruments such as acoustic guitar, electric guitar, and piano. She was a model for catalogs. In 2006 she made her Disney Channel debut in the Disney Channel Original Movie Cow Belles, as "Courtney Callum", along with sister Aly, as "Taylor Callum". She has also appeared on shows such as Oliver Beene, Six Feet Under, The Guardian, and General Hospital. She and her sister appeared in the MTV film Super Sweet 16: The Movie.

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