Aaron John Walpole (born March 7, 1979) is a Canadian actor and singer, who placed third on the third season of Canadian Idol. He is best known for playing the role of Lonnie in the 2010 Toronto run of Rock of Ages and Annas in the 2012 Broadway run of Jesus Christ Superstar. He appeared in the 2014 Broadway revival of Les Misérables, as a part of the ensemble. Walpole was born in London, Ontario, and has two siblings. When he was 10 years old, he saw a production of Jesus Christ Superstar with his family, which inspired him to pursue musical theatre. Walpole attended Parkside Collegiate Institute, where he played football and acted. He appeared in a high school production of West Side Story as Tony. In 2001, Walpole graduated from the musical theatre program at Sheridan College

In 2005, Walpole auditioned for the third season of Canadian Idol. He went to the auditions to support a friend, but was forced to register to audition so he could stay in line with her. Walpole advanced through the audition stages, but was eliminated in the top 32 round. However, he was chosen to compete in the wildcard round where he received enough votes to advance. Walpole finished in third place, behind runner-up Rex Goudie and winner Melissa O'Neil. Following the show, Walpole released a self-titled album in 2006.