Tasmania : in-principle support for marriage equality.

Tasmania’s lower house has become the third state parliament to show support for same-sex marriage.

Late on Wednesday a majority, 15 votes, of the House of Assembly backed a Greens party motion for in-principle support for marriage equality.

Tasmanian Greens leader Cassy O'Connor moved the motion to give in-principle support to marriage equality.

She has told the house denying people the right to marry was denying them the validity and equality of their love.

"Love is just love, it reaches beyond every law, every judgment," she said.

"What harm can it possibly do, it still baffles me that some people of faith still see this as a threat."