Dove was born in Seattle, Washington, to Philip Alan Hostermann and Bonnie Wallace. At the age of eight, she began acting in community theater. When Dove was fourteen she moved to Los Angeles to pursue acting professionally. There she attended Burbank High School and sang in their National Championship Show Choir.
Since 2013, Dove has starred in the dual lead role of Liv and Maddie in the Disney Channel original series Liv and Maddie. The preview of the series began showing on July 19, 2013. The show premiered on September 15, 2013. The pilot episode gained 5.8, which was the most-watched in total viewers in two and a half years. In the episode Twin-A-Rooney, Liv shows Maddie a clip from the Sing It Out Loud! finale in which Liv's character sings a cover of On Top of the World by Imagine Dragons. A full version of the song was recorded by Dove and released by Disney as a full single on August 27, 2013. She also starred in Cloud 9 with Luke Benward, which premiered on January 17, 2014.