In July 2014, she and her sister, filmed in the independent drama, Weepah Way for Now, in Laurel Canyon, California.Michalka participated in the casting process and production for the film.
Michalka and her sister, AJ Michalka, formed the musical duo Aly & AJ in 2004.
They released their first album, Into the Rush, on August 16, 2005.
In 2012, Michalka began dating independent film producer Stephen Ringer, whom she met on the set of her film Sequoia.
The couple became engaged at Big Sur, California, in July 2014.
She gained fame for playing the role of Keely Teslow in the Disney Channel series Phil of the Future and has participated in film and other television roles including Rhiannon Abernathy in the film Easy A, the CW series Hellcats and i Zombie.