She is regarded as one of the best athletes in the Jayco Opals program Allen also represented Australia at the 2011 International Basketball Federation Under-19 World Championship for Women held in Chile. Her long arms and legs earned her the nickname "Spida".
In the domestic Women"s National Basketball League (WNBL), Allen has played for the Dandenong Rangers (2009 - 2010), Australian Institute of Sport (2010 - 2012), Melbourne Boomers (2012–2015) and South East Queensland Stars (2015–present).
Allen played with the Knox Raiders in 2013 SEABL Season where the team took out the Championship. Following good form in preliminary lead-up games, Allen was selected to represent the national team at the 2014 World Championship held in Turkey.
Shortly into the 2015 season, Allen suffered a season-ending right knee cartilage injury and decided to return home to Australia to undergo surgery.