Minogue won't tie knot until law changes

Kylie Minogue and her British fiance would love to tie the knot Down Under but will not be doing so until there is marriage equality in Australia.

The loved-up pair would love to get married in Melbourne says Minogue's man UK actor Joshua Sasse.

"There are chances of a Melbourne wedding ... [but] we will not get married until this law has passed in Australia," Sasse told Network Seven from Vancouver on Thursday.

Minogue and Sasse are fighting for same-sex marriage to be legalised in Australia supporting the "Say I Do Down Under" campaign.

"When I found out that gay marriage was illegal in Australia, I was astounded," Sasse, 28, said.

"I simply can't fathom on any level whether it's moral or religious or anything, that I have the right to get married and to marry the person that I love and that somebody else doesn't because of their sexual orientation."

The Turnbull government has proposed a plebiscite on marriage equality.

Aussie actress Margot Robbie supported the campaign by wearing a T-Shirt on the set of US's Saturday Night Live at the weekend.

Minogue, 48, has previously said how "backward" Australia is on the the issue of same-sex marriage saying "the earth didn't cave in" in other countries where it is legal and that "love is love".