Alexandra Hagan made her Olympic debut at the London 2012 Games at 21 years of age. The West Australian helped qualify the women's eight for the London Games with victory at the Final Olympic Qualification Regatta in Lucerne. Hagan and the Australian women’s eight crew made the A Final finishing in sixth place. She first competed internationally at the 2008 Junior World Championships, finishing fifth in the single sculls. The following year she won a silver medal in the women’s quad sculls at the Junior World Championships in France.