Alyson Renae "Aly" Michalka (//; born March 25, 1989) is an American actress and recording artist. Michalka gained fame for playing the role of Keely Teslow in the Disney Channel original series Phil of the Future. She is also known for her roles as Marti Perkins in the CW television drama Hellcats, 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 AJ Michalka. Aly has modeled for OP (Ocean Pacific) and Penumbra. She has also done fashion shoots for Maxim, OK! and Zooey.