Hazeldine played the role of Gemma Craig in Family Affairs for four years. She has also guest starred in episodes of Kavanagh QC, Heartbeat, The Royal Today and Doctors (soap opera). She made her feature film debut in Kapital, a 2007 collaboration between writer/director Greg Hall and composer Steve Martland. She is also to appear in Hall's next film, Same Shit, Different Day.
Hazeldine sings and plays keyboards in Manchester-based band The Circus Electric, with Sam Stockman' on guitar and lead vocals. They started after the demise of Shepherd's Pi, a band which was formed whilst she was working on Family Affairs and included co-stars Sam Stockman and Rupert Hill. Hazeldine was vocalist and bassist in the band which relocated to the North West in 2004, when Hill was cast as Jamie Baldwin in Coronation Street.
|1998||Kavanagh QC||Teenage patient||TV series|
|Family Affairs||Gemma Craig
— cast regular; 1999–2003, Channel 5
|2007||Heartbeat||Julia Walcott||TV series|
(writer & director: Greg Hall)
|2008||The Royal Today||Helen Travers
— one episode (#1.13); 23 January 2008, ITV1
|Doctors (soap opera)||Claire Baker
— "Hopelessly Devoted" (#9.207); 13 March 2008, BBC One