Kylie Minogue's fiancee Joshua Sasse tells Sunrise they won't marry yet

Kylie and Joshua are engaged but not yet married. Photo / Instagram

Kylie Minogue's fiancee Joshua Sasse has revealed the couple will refuse to tie the knot until same sex marriage is legal in Australia.

Speaking to Sunrise, the British actor and equality campaigner spoke of his shock at the slow progress of the issue Down Under.

Kylie Minogue (L) and Joshua Sasse attend the World Premiere after party of Absolutely Fabulous: The Movie at Liberty on June 29, 2016 in London, England. Photo / Getty

"Australia is the last English speaking part of the western world that is yet to catch up. It is just a complete shock," he said during a live cross from Vancouver.

"After the 25 of June last year, when America passed marriage equality, people have completely gotten behind it. It has not affected society.

Kylie and Joshua. Photo / Instagram

"I think it's important to see how other nations have gone through the process. What it has promoted with love and equality. Isn't that enough?

When questioned by Sunrise host Samantha Armytage about his own wedding plans, Sasse ruled out any immediate plans.

Kylie Minogue and Joshua Sasse attend the One For The Boys Fashion Ball. Photo / Getty

"There are chances of a Melbourne wedding ... (but) we will not get married until this law has passed in Australia," he said.

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

View this post on Instagram

Dolly, Kylie & I kicking off the @sayidodownunder campaign #sayidodownunder #Dollyparton @kylieminogue #lgbti #loveislove

A post shared by Joshua Sasse (@joshuasasse) on Oct 4, 2016 at 2:29pm PDT

"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," Sasse added.

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

Margot Robbie in a marriage equality T-shirt on Saturday Night Live. Photo / Twitter

Minogue, 48, has previously said how "backward" Australia is on 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".