Alyson Renae "Aly" Michalka (born March 25, 1989), often credited as Aly, is an American actress, singer-songwriter, musician and dancer, presently starring as Marti Perkins in the CW television series Hellcats.

She was known for her roles as Keely Teslow in the Disney Channel original series Phil of the Future, Charlotte Barnes in the feature film Bandslam, Taylor Callum in the Disney Channel Original Movie Cow Belles, and Rhiannon Abernathy in the Golden Globe-nominated teen film Easy A. She is also known as one-half of the musical duo 78violet (formerly Aly & AJ) with her sister Amanda Michalka.