Sinn Fein's Megan Fearon launched Sinn Fein's marriage equality pledge in Belfast on Tuesday afternoon.
Ms Fearon, an Assembly candidate for Newry and Armagh, said, "There is a growing demand for marriage equality across the north.
"Equal marriage threatens no one. It is about equal rights for everyone.
"This pledge asks all candidates to sign up to work to legislate for equal marriage and to eradicate all forms of prejudice.
"Sinn Féin is committed to seeing marriage equality extended across the island and to opposing homophobia, sectarianism, sexism and all other forms of discrimination wherever they occur.
"This is part of Sinn Féin's commitment to equality and we are asking all other candidates to sign this pledge."