In 1999 Allsop landed her break through role. She auditioned for Blue Heelers and won the lead role of Constable Jo Parrish. Over the next 5 years she would become one of Blue Heelers' all-time most popular characters, winning a Logie Award for the Most Popular New Female Talent in 2000, and receiving a nomination for a Silver Logie for Most Popular Actress in 2005. She played the role until 2004 when she left to pursue further career options. Her character was killed off in a bombing, this was used as part of a major revamp of the show.
