Alyson Renae "Aly" Michalka (born March 25, 1989), often credited as Aly, is an American actress, singer-songwriter, and musician. Michalka gained fame for playing the role of Marti Perkins in the CW television drama Hellcats. She was also known for her roles as Keely Teslow in the Disney Channel original series Phil of the Future, Charlotte Barnes in the film Bandslam, Taylor Callum in the Disney Channel Original Movie Cow Belles, Rhiannon Abernathy in the Golden Globe-nominated teen film Easy A and as Tracy Morgan in the thriller The Roommate. She is also known as one-half of the musical duo 78violet (formerly Aly & AJ) with her sister Amanda Michalka.
Michalka made her acting debut as Keely Teslow on the Disney Channel Original Series, Phil of the Future. She has also starred in the Disney Channel Original Movies Now You See It..., in which she played Allyson Miller, an ambitious television producer, and Cow Belles, in which she appears opposite her sister. She had a leading role in the Walden Media film Bandslam, about a group of misfits who form a rock band. The film, which also starred Vanessa Hudgens, was released in August 2009.
Michalka had a main role as Marti Perkins in the CW cheerleading drama series Hellcats, alongside Ashley Tisdale. The series premiered on September 8, 2010. However, after one season it was announced by the CW that the show will not be renewed for the 2011–12 fall schedule.
On July 28, 2011, it was reported Michalka will guest star in an episode of CSI: NY that will air on September 30, 2011.
Michalka and her sister comprise the musical duo 78violet, and released their first album, Into the Rush, on August 16, 2005. The next year, they brought out a holiday album in September, covering 9 tracks, along with two originals, titled Acoustic Hearts of Winter. In July 2007, their album, Insomniatic, hit stores, featuring the American top 20 hit single, "Potential Breakup Song". The two were to release a third album in early 2010, but it has been postponed after they left their label.
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Alyson Michalka at Deus Ex Human Revolution Gaming Launch Party in Hollywood