Career
Siversen began to enjoy acting and went on to perform with Street Martins Youth Theatre, appearing in many productions. Siversen was to study law, but decided to stick with acting after attending a careers day at university. Siversen has also trained in jazz dance and ballet.
Her television credits include The Flying Doctors, Sugar and Spice, BackBerner, MDA and All Saints, Janus, Prisoner, Rush, Special Squadron
But Siversen will always be best known for her portrayal of nasty Lou Kelly in the Network Ten series Prisoner. Siversen had done several bit-parts in the series and at the time the character of Lou was devised had been a regular extra for several months, playing one of the prisoners.
Siversen auditioned, and got the part. Kelly quickly became one of the main characters of the series and had a run of three years.
She also appeared in the 1989 Australian horror film Houseboat Horror.