Bilyk was elected to serve a six-year term in the Senate at the
2007 federal election, after being placed in the third position on the
Australian Labor Party's
Tasmanian ticket. She was elected to the sixth Senate seat for Tasmania, on preferences distributed from
Andrew Wilkie, the
Australian Greens' second candidate for the Senate in Tasmania in the 2007 election. It was second time lucky for Bilyk, who had also been preselected in third spot on the Labor Senate ticket in Tasmania at the
2001 federal election, but failed to win a seat. On 27 February 2016, Bilyk announced that she supports
same-sex marriage, having previously opposed it. ==Cancer advocacy==